Genetika masalalar to’plami

MITOZ, MEYOZ, XROMOSOMA, URUG’LANISH

1. Bodring ildiz hujayrasida 14 tadan xromosoma uchraydi. Uning a) murtagida; b) tuxum hujayrasida; c) chang donasining vegetativ hujayrasida; d) endosperm hujayrasida nechtadan xromosoma bo’ladi?

A) a-7; b-7; c-7; d-14 B) a-14; b-14; c-14; d21
C) a-14; b-7; c-7; d-21 D) a-14; b-7; c-7; d-14

2. Bug’doy o’simligi tetraploid navining mikrosporadan vegetativ hujayraning hosil bo’lishida profaza (a), metafaza (b), anafaza (c) bosqichlaridagi xromosoma (1) va DNK molekulalari (2) soni to’g’ri keltirilgan javobni ko’rsating.

A) 1: a-14, b-14, c-28; 2: a-28, b-28, c-28
B) 1: a-28, b-28, c-56; 2: a-56, b-56, c-56
C) 1: a-7, b-7, c-14; 2: a-14, b-14, c-14
D) 1: a-28, b-28, c-28; 2: a-28, b-28, c-28

3. Olcha (a), turp (b), qalampir (c) o’simliklarining barg hujayralari kariotipida xromosomalar soni nechtaga teng?

1) 48; 2) 32; 3) 18; 4) 16; 5) 32; 6) 24; 7) 46
A) a-5; b-3; c-1 B) a-2; b-4; c-7
C) a- 2; b-3; c-1 D) a-4; b-3; c-1

4. Embrional rivojalanishning maydalanish bosqichida uch marta ekvatorial bo’linishdan so’ng blastomerlar soni nechta bo’ladi?

A) 8 B) 512 C) 128 D) 32

5. Sholi o’simligi hujayrasida qalampir o’simligiga nisbatan ikki barobar kam xromosoma bo’ladi. Sholi o’simligi ildizining hujayrasida sodir bo’layotgan mitozning telofaza bosqichi yakunida hujayra yadrosida xromosomalar soni qancha bo’ladi?

A) 12 B) 48 C) 24 D) 22

6. Embrional rivojalanishning maydalanish bosqichida olti marta meridinal bo’linishdan so’ng blastomerlar soni nechta bo’ladi?

A) 64 B) 1024 C) 128 D) 512

7. Qalampir o’simligida meyoz jarayoni buzilishi natijasida hujayradagi birinchi juft xromosoma va oltinchi juft xromosomalar ajralmay bitta qutbga to’planishdi. Shu hujayradan hosil bo’lgan spermalar ishtrokida urug’langan markaziy hujayrasida xromosomalar soni nechtadan bo’ladi?

A) 56 yoki 58 B) 71 yoki 73
C) 70 yoki 74 D) 46 yoki 50

8. Qaysi javobda sog’lom yigitning nerv hujayrasida (a), jinsiy hujayrasida (b), leykotsitlarida (c) autosomalar va jinsiy xromosomalar soni to’g’ri ko’rsatilgan?

A) a - 44, 2; b - 23, 1; c - 23, 2
B) a - 44, 2; b - 22, 1; c - 44, 2
C) a - 23, 1; b - 46, 2; c - 46, 1
D) a - 23, 1; b - 23, 1; c - 46, 2

9. 8 mol glyukoza parchalandi. Shundan ikki moli to’liq parchalandi. Jami qancha ATF hosil bo’ldi.

A) 304 B) 72 C) 88 D) 76

10. Turpning somatik hujayrasida 16 ta autosoma bo’lsa, bo’linayotgan hujayraning anafaza bosqichida xromasomalar sonini aniqlang.

A) 18 B) 36 C) 72 D) 32

11. Turpning somatic hujayrasida 18 ta xromasoma bo’lsa, bo’linayotgan hujayraning anafaza bosqichida xromatidlar sonini aniqlang.

A) 18 B) 36 C) 72 D) 32

12. Karam hujayrasida mitoz siklining G2

bosqichidagi DNK sonini aniqlang.
A) 16 B) 18 C) 32 D) 36

13. Karam hujayrasida mitoz siklining G2

bosqichidagi xromasoma sonini aniqlang
A) 16 B) 18 C) 32 D) 36

14. Karam hujayrasida mitoz siklining G2

bosqichidagi xromatidlar sonini aniqlang
A) 16 B) 18 C) 32 D) 36

15. Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli anafaza oxirida xromasoma sonini aniqlang.

A) 96 B) 192 C) 48 D) 384

16. Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli anafaza bosqichida qutblarga nechtadan xromasoma tarqalishini aniqlang.

A) 96 B) 192 C) 48 D) 384

17. Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli anafaza oxirida xromatid sonini aniqlang.

A) 96 B) 192 C) 48 D) 384

18. Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli interfazadan so’ng DNK sonini aniqlang.

A) 96 B) 192 C) 48 D) 384

19. Olchaga nisbatan 3 barobar ko’p xromasomaga ega o’simlikning mitoz sikli interfazadan so’ng mikronaychalar sonini aniqlang.

A) 54 B) 108 C) 0 D) 27

20. Uy pashshsining somatik hujayrasida xromasoma soni drozofilaga nisbatan 4 taga ko’p bo’lsa, mitoz sikli anafaza oxirida xromasoma sonini aniqlang.

A) 32 B) 48 C) 12 D) 24

21. Uy pashshsining somatik hujayrasida xromasoma soni drozofilaga nisbatan 4 taga ko’p bo’lsa, mitoz sikli anafaza oxirida xromatid sonini aniqlang.

A) 32 B) 48 C) 12 D) 24

22. Uy pashshsining somatik hujayrasida xromasoma soni drozofilaga nisbatan 4 taga ko’p bo’lsa, mitoz sikli interfazadan so’ng DNK sonini aniqlang.

A) 32 B) 48 C) 12 D) 24

23. Uy pashshsining somatik hujayrasida xromasoma soni drozofilaga nisbatan 4 taga ko’p bo’lsa, mitoz sikli interfazadan so’ng xromatid sonini aniqlang.

A) 32 B) 48 C) 12 D) 24

24. Urg’ochi kaptarning somatik hujayrasida 80 ta xromosoma mavjud. Erkak kaptarning birlamchi jinsiy hujayrasidagi xromosomalar holatini aniqlang.

A) 78 ta autosoma, 2 juft jinsiy xromosoma
B) 39 juft autosoma, X va Y xromosoma
C) 39 juft autosoma, bir juft X xromosoma
D) 39 ta autosoma, bir juft X xromosoma

25. Sog’lom odamning somatik hujayrasida mitozning profaza (a), metafaza (b), anafaza (c) bosqichlarida xromosoma (1) va DNK (2) lar sonini aniqlang.

A) 1-a-46, b-46, c-92; 2-a-92, b-92, c-92
B) 1-a-23, b-23, c-23; 2-a-46, b-46, c-46
C) 1-a-46, b-46, c-46; 2-a-92, b-46, c-46
D) 1-a-46, b-92, c-92; 2-a-46, b-92, c-92

26. Karam o’simligi diploid turida meyoz I jarayoni anormal kechishi natijasida bir juft xromosomalar ajralmay qutblarga noteng taqsimlandi. Hosil bo’lgan ikkala hujayradagi xromosomalar to’plami sonini aniqlang.

A) 28 va 26 ta B) 19 va 17 ta
C) 10 va 8 ta D) 18 va 19 ta

27. Lansetnik embrionidagi blastomerlar 128 taga yetishi uchun hujayralar necha marta meridinal (a) va ekvatorial (b) bo’linish kerak?

A) a-3; b-4 B) a-4; b-3 C) a-4; b-2 D) a-2; b-4

28. Bo’linish natijasida 8 ta blastomer hosil bo’ldi, keyingi 16, 32, 64 ta blastomerning qanday bo’linishlardan keyin hosil bo’lishini juftlab ko’rsating.

A) meridianal - 16; ekvatorial - 32; meridiаnal - 64
B) ekvatorial - 16; meridiаnal - 32; ekvatorial - 64
C) meridiаnal -16; meridiаnal - 32; ekvatorial - 64
D) ekvatorial - 16; ekvatorial - 32; meridiаnal - 64

29. Olchaning quyida berilgan qismlarida xromosoma soni a=16 ta, b=32 ta, c=48 ta emas.

1) endosperm; 2) tuxum hujayra; 3) po’kak; 4) chang donasi; 5) changdon; 6) urug’chi; 7) vegetativ hujayra; 8) generativ hujayra; 9) spermiy
A) a-1,3,4,5,6; b-1,2,3,4,7,8,9; c-2,3,5,6,7,8,9
B) a-1,3,6,10; b-1,2,3,7,8,9; c-2,10
C) a-1,3,4,6,10; b-1,2,4,5,7,8,9; c-2,3,5,10
D) a-1,3,5,6,10; b-1,2,4,7,8,9; c-2,10
30. Blastomerlari 32 taga yetgan uy sichqoni embrionida jami xromosomalar soni 1280 ta bo’lsa, urug’lantirishda qatnashgan spermatazoidda nechta xromosoma bo’ladi?
A) 40 B) 20 C) 60 D) 16

31. Tog’olcha murtak xaltasidagi hujayralarda jami qancha xromosoma bor?

A) 64 B) 16 C) 32 D) 8

32. Meyoz buzilishi tufayli makkajo’xori hujayrasidagi ikkinchi va beshinchi xromosomalar jufti tarqalmay bir qutbga o’tdi. Hosil bo’lgan shu spermiylar ishtirokida urug’langan murtakda xromosomalar nechta bo’ladi?

A) 18 yoki 22 B) 29 yoki 31
C) 19 yoki 21 D) 28 yoki 32

33. Blastomerlari 32 taga yetgan uy sichqoni embrionida jami xromosomalar soni 1280 ta bo’lsa, urug’lantirishda qatnashgan spermatazoid-da xromosomalar qanday holatda bo’ladi?

A) 19+Y B) 20+X C) 38+XX D) 20+Y

34. Qora kalamushning tuxum hujayra-sidagi autosoma xromosomalari soni 18 ga teng bo’lsa hamda embrional rivojlanishning maydalanish bosqichida hosil bo’lgan hujayralarda jami xromosomalar 19456 taga yetgan bo’lsa, blastomerlar soni nechta ekanligini aniqlang.

A) 256 B) 512 C) 1024 D) 128

35. Lansetnik embrionidagi blastomerlar 8 taga yetishi uchun hujayralar necha marta meridianal va ekvatorial bo’linish kerak?

A) 4 va 2 B) 2 va 1 C) 4 va 3 D) 5 va 3

36. Sholi o’simligi 158 ta urug’ hosil qildi. Urug’lanishda qatnashgan spermatozoidlar sonini aniqlang?

A) 316 B) 158 C) 632 D) 79

37. Sholi o’simligi 158 ta urug’ hosil qildi. Uning spermatazoididagi xromasomalar soni makkajo’xorinikidan 1 taga ko’p ekanligi ma’lum bo’lsa, urug’lanishda qatnashgan spermatozoid-lardagi jami xromasomalar sonini aniqlang?

A) 3476 B) 6636 C) 1738 D) 6000

38. Arpa o’simligidan 400 ta urug’ olindi. Endospermidagi xromasoma soni 33 ga teng ekanligi ma’lum bo’lsa, urug’ hosil bo’lishida qatnashgan spermatozoidlardagi jami xromasoma sonini aniqlang?

A) 8800 B) 8000 C) 7600 D) 4400

39. Yerbag’ir tugmachagulning changlanish jarayonida urug’chi tumshuqchasiga 23 ta chang donachasi kelib tushdi. Urug’lanishdan so ‘ng 17 ta urug’ hosil bo’ldi. Urug’lanish jarayonida qatnashmagan spermatozoidlar jami sonini aniqlang?

A) 12 B) 17 C) 34 D) 6

40. Yerbagir tugmachagulning changlanish jarayonida urug’chi tumshuqchasiga 23 ta chang donachasi kelib tushdi. Urug’lanishdan so’ng 17 ta urug’ hosil bo’ldi. Urug’lanish jarayonida qatnashgan spermatozoidlar jami sonini aniqlang?

A) 12 B) 17 C) 34 D) 6

41. Na’matak endospermidagi autosoma soni 33 ga teng. Changlanish jarayonida urug’chi tumshuqchasiga 18 ta chang donachasi kelib tushdi. Urug’lanishdan so’ng 15 ta urug’ hosil bo’ldi. Urug’lanish jarayonida qatnashgan spermatozoidlardagi jami xromasomalar sonini aniqlang?

A) 360 B) 330 C) 432 D) 180

42. Xrizantema meyoz siklining anafaza II bosqichida xromasoma soni 36 ta bo’lsa, anafaza I dagi xromasoma sonini aniqlang?

A) 36 B) 18 C) 72 D) 30

43. Xrizantema meyoz siklining anafaza II bosqichida xromasoma soni 36 ta bo’lsa, interfazadagi xromasoma sonini aniqlang?

A) 36 B) 18 C) 72 D) 30

44. Xrizantema meyoz siklining anafaza II bosqichida xromasoma soni 36 ta bo’lsa, anafaza I dagi DNK sonini aniqlang?

A) 36 B) 18 C) 72 D) 30

45. Ma’lum bir meva ichida 5 ta urug’ hosil bo’ldi. Shu urug’ hosil bo’lishida qatnashgan tuguncha (a), urug’kurtak (b), sperma (c) va tuxum hujayra (d) lar sonini aniqlang?

A) a-1; b-5; c-10; d-5 B) a-5; b-5; c-5; d-5
C) a-1; b-1; c-5; d-5 D) a-5; b-1; c-10; d-10

46. 800 ta birlamchi spermatazoidlar meyoz va mitoz bo’lingandan so’ng hosil bo’lgan spermalarning 20 % i tuxum hujayrani urug’lantirishda qatnashdi. Hosil bo’lgan murtak sonini aniqlang.

A) 1280 B) 640 C) 6400 D) 2560

47. 800 ta birlamchi spermatazoidlar meyoz va mitoz bo’lingandan so’ng hosil bo’lgan spermalarning 20 % i tuxum hujayrani urug’lantirishda qatnashdi. Urug’lanishda qatnashmagan spermalar sonini aniqlang.

A) 1280 B) 3840 C) 6400 D) 2560

48. 800 ta birlamchi spermatazoidlar meyoz va mitoz bo’lingandan so’ng hosil bo’lgan spermalarning 20 % i tuxum hujayrani urug’lantirishda qatnashdi. Urug’lanishda qatnashgan spermalar sonini aniqlang.

A) 1280 B) 3840 C) 6400 D) 2560

49. 800 ta birlamchi spermatazoidlar meyoz va mitoz bo’lingandan so’ng hosil bo’lgan spermalarning 20 % i qo’sh urug’lanishda qatnashdi. Tuxum hujayra bilan qo’shilgan spermalar sonini aniqlang.

A) 1280 B) 640 C) 6400 D) 2560

50. Daun sindromi bilan kasallangan erkak hujayra siklining metafaza bosqichida autosoma sonini aniqlang.

A) 47 B) 44 C) 45 D) 94

51. Daun sindromi bilan kasallangan erkak hujayra siklining metafaza bosqichida xromasoma sonini aniqlang.

A) 47 B) 44 C) 45 D) 94

52. Daun sindromi bilan kasallangan erkak hujayra siklining metafaza bosqichida DNK sonini aniqlang.

A) 47 B) 88 C) 45 D) 94

53. Klaynfelter sindromi bilan kasallangan erkak hujayra siklining metafaza bosqichida autosoma sonini aniqlang.

A) 47 B) 44 C) 45 D) 94

54. Klaynfelter sindromi bilan kasallangan erkak hujayra siklining metafaza bosqichida xromasoma sonini aniqlang.

A) 47 B) 44
C) 45 D) 94

55. Qora kalamushning tuxum hujayrasidagi autosoma xromosomalari soni 20 ga teng bo’lsa hamda embrional rivojlanishning maydalanish bosqichida hosil bo’lgan hujayralarda jami xromosomalar 21504 taga yetgan bo’lsa, embrion necha marta meridian yo’nalish bo’ylab bo’lingan?

A) 4 B) 10 C) 6 D) 5

56. Uy tovug’ining somatik hujayrasida 78 tadan xromosoma bo’lsa, uning hujayrasida interfazaning G2 davridagi hujayra yadrosida nechta xromatid bo’ladi?

A) 156 B) 78 C) 312 D) 160

57. Blastomerlari 16 taga yetgan tulki embrionida jami xromosomalar soni 608 ta bo’lsa, tulki tana hujayrasida interfazaning G2 davridagi hujayra yadrosida nechta xromatid bo’ladi?

A) 38 B) 76 C) 19 D) 152

58. Blastomerlari 16 taga yetgan tulki embrionida jami xromosomalar soni 608 ta bo’lsa, tulki tana hujayrasida miozning anafaza davridagi hujayra yadrosida nechta xromatid bo’ladi?

A) 38 B) 76 C) 19 D) 152

59. Blastomerlari 16 taga yetgan tulki embrionida jami xromosomalar soni 608 ta bo’lsa, tulki tana hujayrasida interfazaning G2 davridagi hujayra yadrosida nechta DNK bo’ladi?

A) 38 B) 76 C) 19 D) 152

60. Kaptar tana hujayrasida 39 juft autosoma bo’ladi. Kaptar hujayrasi xromosomalariga nisbatan 2 barobar kam xromosomaga ega bo’lgan uy sichqoni tana hujayrasida interfazaning G2 davridagi hujayra yadrosida nechta DNK bo’ladi?

A) 40 B) 80 C) 78 D) 41
61. Xromosomasi poliploid to’plamli o’simliklar guruhini belgilang. l) g’o’za 26; 2) tamaki 48; 3) tamaki 24; 4) bug’doy 14; 5) xrizantema 90; 6) no’xot 14
A) 1,5 B) 3,5 C) 5,2 D) 3,1

62. Noma’lum hayvon 3 marta meridian bo’linish bilan 4 marta ekvatrial bo’linishi natijasida blastamerlardagi xromasomalar farqi 15872 ni tashkil qilsa tuxum hujayrasida nechata xromasoma bo’ladi?

A) 64 B) 32 C) 30 D) 16

63. Yangi dunyo g’o’zasini markaziy hujayra va spermiy qo’shilishidan hosil bo’lgan hujayradagi xromosoma to’plami ituzumdoshlar oilasiga kiruvchi qaysi o’simlikning poliploid to’plamidan 1,625 marta ko’p.

A) qalampir B) xrizantema
C) tamaki D) bug’doy

64. Embrion blastomerlari soni 128 taga yetishi uchun necha foiz hujayralar ekvator tekisligida bo’lingan?

A) 66,14 B) 57,15 C) 42,85 D) 33,86

65. Makkajo’xorining gaploid (a), diploid (b) xromosomalar soni va birikkan genlar guruhining soni (d) to’g’ri ko’rsatilgan javob variantini tanlang?

1) 20; 2) 10; 3) 5; 4) 15.
A) a-2, b-1, d- 3 B) a-2, b-1, d-4
C) a-2, b-1, d-2 D) a-2, b-1, d-1

66. Suvarak zigotasining ikkinchi marta ekvatorial bo’linishidan hosil bo’lgan blastomerlarda necha juft xromosoma bo’ladi?

A) 384 B) 768 C) 192 D) 1536

67. Arpa o’simligi ildizining o’sish zonasi hujayrasidagi xromosomalar soni 21 juft bo’lsa, mikrosporani hosil qiluvchi birlamchi hujayradagi xromosomalar sonini aniqlang.

A) 21 B) 63 C) 84 D) 42

68. Barbara Mak-Klinton regulyator genlarni o’rgangan o’simlikning arxeosporasi meyoz bo’linishning metafaza II bosqichidagi DNK miqdorini aniqlang. (kariotip 2n ga teng)

69. Karam diploid navi generativ hujayrasi mitoz bosqichlari va ularda kuzatiladigan holatlarni mos ravishda juftlang.

a) bir DNKli xromosomalarning diploid to’plami; b) bir DNKli xromosomalarning gaploid to’plami; c) ikki DNKli xromosomalarning diploid to’plami; d) ikki DNKli xromosomalarning tetraploid to’plami; e) ikki DNKli xromosomalarning gaploid to’plami.
A) profaza – c; metafaza – c; anafaza – d; telofaza – a
B) profaza – e; metafaza – e; anafaza – a; telofaza – b
C) profaza – a; metafaza – c; anafaza – d; telofaza – b
D) profaza – c; metafaza – c; anafaza – d; telofaza – e

70. Qora kalamushning tuxum hujayrasidagi autosoma xromosomalar soni 20 ga teng bo’lsa hamda embryonal rivojlanishning maydalanish bosqichida hosil bo’lgan hujayralarda jami xromasomalar 21504 taga yetgan bo’lsa, embrion necha marta meridian yo’nalish bo’ylab bo’lingan?

A) 4 B) 10 C) 6 D) 5

71. Blastomerlari 16 taga yetgan tulki embrioning jami xromasomalar soni 608 ta bo’lsa, tulki tana hujayrasida interfazaning G2 davridagi hujayra yadrosida nechta DNK bo’ladi?

A) 38 B) 76 C) 19 D) 152

72. O’rikning somatik hujayrasida olchanikiga nisbatan 2 barobar kam xromosoma mavjud. Meyozning metafaza II bosqichida ekvatorda nechta xromatida joylashgan bo’ladi?

A) 8 B) 32 C) 24 D) 16

73. Agar qora kalamushning tuxum hujayrasidagi autosoma xromosomalari soni 18 ta bo’lsa hamda embrional rivojlanishning maydalanish bosqichida hosil bo’lgan hujayralarda jami xromosomalar 19456 taga yetgan bo’lsa, embrion ekvatorial yo’nalish bo’ylab necha marta bo’lingan?

A) 4 B) 5 C) 6 D) 3

74. Shimpanze tanasi hujayralaridagi xromosomalar soni to’g’ri berilgan javobni aniqlang. a) ovogenezning o’sish davri yakunidagi hujayra;

b) yetuk qon plastinkalari; c) urug’lanish davridagi tuxum hujayra pronukleusi; d) spermatogenezning ko’payish davri yakunidagi hujayralar; e) bachadon devori muskul hujayralari; f) urug’langan tuxum hujayra tarkibidagi spermatozoid pronukleusi;
g) gametogenezning yetilish davri yakunidagi hujayra.
A) a-48; c-24; d-48; e-24; f-24; g-24
B) a-48; c-24; d-24; e-48; f-24; g-48
C) a-48; c-24; d-48; e-48; f-24; g-24
D) a-48; c-24; d-48; e-24; f-24; g-48

75. Yeryong’oq o’simligi somatik hujayrasi yadrosida makkajo’xori diploid to’plamiga nisbatan ikki barobar ko’p xromosoma mavjud. Yeryong’oqning mikrosporasida (a), endospermidagi bitta hujayrada (b) va murtak xaltasidagi hujayralarda (c) jami qanchadan xromosoma bo’ladi?

A) a-20; b-60; c-160 B) a-30; a-90; c-240 C) a-20; b-60; c-140 D) a-20; b-90; c-240

76. Shaftolining somatik hujayrasida olchaning gaploid holatdagi xromosomasiga nisbatan 2 barobar ko’p xromosoma mavjud. Meyozning anafaza I bosqichida har bir qutbga nechta xromosoma tarqaladi?

A) 64 B) 8 C) 32 D) 16

77. Norka somatik hujayrasidagi xromasomalar soni drozofila somatik hujayrasidagi autosomalar sonidan 5 marta ko’p bo’lsa, norkada gametogenezning interkinez bosqichida xromasomalar soni nechta bo’ladi?

A) 15 B) 40 C) 30 D) 20

78. Odamning birlamchi spermatozoidlari tarkibidagi autosomalar sonini ko’rsating.

A) 22 B) 44 C) 45 D) 2l

77. Geksaploid tamakining mikrosporasidagi (a) va arxeosporasidagi (b) autosomalar miqdorini aniqlang.

A) a-35; b-70 B) a-36; b-36
C) a-36; b-72 D) a-36; b-18

78. Do’lana urug’lanishdan so’ng 9 ta urug’li meva hosil qildi. Urug’lanishda ishtirok etgan chang naychalari soni, tugunchadagi urug’kurtaklar soni va spermalar sonini ko’rsating.

A) 9;9;9 B) 1;1;9 C) 9;9;18 D) 9;18;1

79. Tamaki meyoz siklining anafaza II bosqichida xromosoma soni 48 ta bo’lsa, anafaza I dagi DNK sonini aniqlang.

A) 48 B) 24 C) 96 D) 88

80. Lansetnik embrionida blastomerlar soni olchaning diploid to’plamidagi xromosomalar soniga yetishi uchun hujayralar necha marta meridianal va ekvatorial bo’linishi lozim?

A) 4 va 2 B) 3 va 2 C) 3 va 1 D) 5 va 3

81. Shimpanzeda blastamerlar soni, undagi xromasomalar sonidan 6016 martaga farq qilsa, necha marta meridian (a) va necha marta ekvatrial (b) bo’linganligini aniqlang.

A) a-4; b-3 B) a-4; b-4 C) a-4; b-2 D) a-5; b-4

82. Bug’doyning diploid navi changdonidagi mikrosporalar soni uning somatik hujayrasi yadrosidagi xromosomalar sonidan 6 barobar ko’p miqdorda yetildi deylik. Agar urug’lanish jarayonida 56 ta spermiy ishtirok etgan bo’lsa, urug’lanish jarayonida ishtirok etmagan spermiylardagi xromosomalar sonini ko’rsating. A) 196 B) 392 C) 784 D) 1568

83. 125 ta birlamchi spermatozoidlar meyoz va mitoz bo’lingandan so’ng hosil bo’lgan spermalar-ning 14 % i tuxum hujayrani urug’lantirishda qatnashdi. Tuxum hujayralar bilan qo’shilgan spermalar sonini aniqlang.

A) 70 B) 140 C) 280 D) 175

84. Embrional rivojlanishning maydalanish bosqichida uch marta ekvatorial bo’linishdan so’ng hosil bo’lgan blastomerlarda jami xromoso-malar soni 6144 ta ga yetdi. Noma’lum organizm-ni toping. A) qora kalamush B) suvarak

C) drozofila D) zog’ora baliq
85. Tog’olcha mikrosporasi bo’linishining metafaza davrida nechta xromosoma (a) va xromatida (b) bo’ladi?
A) a-8; b-16 B) a-16; b-16
C) a-32; b-32 D) a-16; b-32

86. Zog’ora baliqda mitozning anafaza bosqichida ikki qutbga qarab qancha autosoma xromosoma tarqaladi?

A) 52 juft B) 51 juft C) 25 juft D) 26 juft

87. Odam organizmida gametogenezning yetilish davrining telofaza II (a) va telofaza I (b) yakunida xromosomlar soni qaysi javobda to’g’ri juftlangan? A) a-46; b-23 B) a-23; b-23

C) a-23; b-46 D) a-92; b-23

88. Noma’lum o’simlik mikrosporalarining mitoz bo’linish anafazasida autosoma xromosomalari soni 14 ta bo’lsa, bu qaysi o’simlik bo’lishi mumkin?

A) olxo’ri B) tog’olcha C) bug’doy D) olcha

89. Odam tanasidagi hujayra siklining qaysi davrida 2 ta hujayra markazi, 108 ta sentriola mikronaychalari va 46 ta xromosoma mavjud?

A) G2 B) anafaza C) telofaza D) G1

90. Qora kalamushning zigotasi 4 marata meridianal bo’lingandan so’ng uning blastulasidagi blastamerlarida jami xromasomalr soni 2432 taga yetgan bo’lsa, unig tuxum hujayrasidagi xromasomalar sonini aniqlang.

A) 19 B) 20 D) 18 D) 21

91. Qora kalamushning zigotasi 4 marata meridianal bo’lingandan so’ng uning blastulasidagi blastamerlarida jami xromasomalr soni 2688 taga yetgan bo’lsa, unig tuxum hujayrasidagi xromasomalar sonini aniqlang.

A) 19 B) 20 D) 18 D) 21

92. Qora kalamushning zigotasi 4 marata meridianal bo’lingandan so’ng uning blastulasidagi blastamerlarida jami xromasomalr soni 2432 taga yetgan bo’lsa, unig somatik hujayrasidagi xromasomalar sonini aniqlang.

A) 38 B) 40 D) 42 D) 44
93. Qora kalamushning zigotasi 4 marata meridianal bo’lingandan so’ng uning blastulasidagi blastamerlarida jami xromasomalr soni 2688 taga yetgan bo’lsa, unig somatik hujayrasidagi xromasomalar sonini aniqlang.
A) 38 B) 40 D) 42 D) 44

94. Qora kalamushning zigotasi 4 marata meridianal bo’lingandan so’ng uning blastulasidagi blastamerlarida jami xromasomalr soni 2432 taga yetgan bo’lsa, unig somatik hujayrasidagi autosomalar xromasomalar sonini aniqlang.

A) 36 B) 40 D) 42 D) 44

95. Qora kalamushning zigotasi 4 marata meridianal bo’lingandan so’ng uning blastulasidagi blastamerlarida jami xromasomalr soni 2688 taga yetgan bo’lsa, unig somatik hujayrasidagi autosomalar xromasomalar sonini aniqlang.

A) 36 B) 40 D) 42 D) 44

96. Xrizantemani murtak xaltasida jami 72 xromasoma bo’lsa ildiz qinchasidagi xromasomalar sonini aniqlang.

A) 9 B) 8 C) 18 D 216

97. Xrizantemani murtak xaltasida jami 144 xromasoma bo’lsa ildiz qinchasidagi xromasomalar sonini aniqlang.

A) 9 B) 24 C) 18 D) 36

98. Xrizantemani murtak xaltasida jami 72 xromasoma bo’lsa ildiz qinchasidagi autosoma xromasomalar sonini aniqlang.

A) 9 B) 8 C) 18 D) 16

99. Xrizantemani murtak xaltasida jami 144 xromasoma bo’lsa ildiz qinchasidagi autosoma xromasomalar sonini aniqlang.

A) 26 B) 34 C) 18 D) 30

100. No’xat o’simlining kariotipida 14 ta xromasoma bo’lsa, Uning a-barg og’izchalarida, b-tuxum hujayrasida, c-mikrosporasida, d-arxeosporasida, e-endosperimida necha xromasoma bor?

A) a-14, b-7, c-7, d-14, e-21
B) a-14, b-7, c-7, d-7, e-14
C) a-14, b-7, c-14, d-14, e-21
D) a-14, b-7, c-7, d-14, e-14

101. Bug’doy o’simlining kariotipida 14 ta xromasoma bo’lsa, Uning a-barg og’izchalarida, b-tuxum hujayrasida, c-mikrosporasida, d-arxeosporasida, e-endosperimida necha xromasoma bor?

A) a-14, b-7, c-7, d-14, e-21
B) a-14, b-7, c-7, d-7, e-14
C) a-14, b-7, c-14, d-14, e-21
D) a-14, b-7, c-7, d-14, e-14

102. Xrizantema o’simlining kariotipida 18 ta xromasoma bo’lsa, Uning a-barg og’izchalarida, b-tuxum hujayrasida, c-mikrosporasida, d-arxeosporasida, e-endosperimida necha xromasoma bor?

A) a-18, b-9, c-9, d-18, e-27
B) a-18, b-9, c-9, d-9, e-18
C) a-18, b-9, c-18, d-18, e-27
D) a-18, b-9, c-9, d-18, e-18

103. Karam o’simlining kariotipida 18 ta xromasoma bo’lsa, Uning a-barg og’izchalarida, b-tuxum hujayrasida, c-mikrosporasida, d-arxeosporasida, e-endosperimida necha xromasoma bor?

A) a-18, b-9, c-9, d-18, e-27
B) a-18, b-9, c-9, d-9, e-18
C) a-18, b-9, c-18, d-18, e-27
D) a-18, b-9, c-9, d-18, e-18

104. Turp o’simlining kariotipida 18 ta xromasoma bo’lsa, Uning a-barg og’izchalarida, b-tuxum hujayrasida, c-mikrosporasida, d-arxeosporasida, e-endospermida necha xromasoma bor?

A) a-18, b-9, c-9, d-18, e-27
B) a-18, b-9, c-9, d-9, e-18
C) a-18, b-9, c-18, d-18, e-27
D) a-18, b-9, c-9, d-18, e-18

105. Qalampir o’simligining kariotipida 48 ta xromasoma bo’lsa, Uning a-barg og’izchalarida, b-tuxum hujayrasida, c-mikrosporasida, d-arxeosporasida, e-endospermida necha xromasoma bor?

A) a-48, b-24, c-24, d-48, e-72
B) a-48, b-24, c-24, d-24, e-48
C) a-48, b-24, c-48, d-48, e-72
D) a-48, b-24, c-24, d-48, e-48

106 Diploid to’plamli Pisum Sativum o’simligining makrosporatsitidagi xromosomalar sonini aniqlang.

A)14 B)7 C)18 D)9
107. Ulotriksni jinsiy ko’payishida 256 ta gameta hosil bo’lgan bo’lsa shu gametaning 25 % dan zigota hosil bo’lgan zigotaning 50 % dan ulotriks iplari hosil bo’ldi.
Qancha ulotriks iplari hosil bo’lgan?
A) 64 B) 32 C) 128 D) 16

108. Karam endospermida xromosomalar sonidan bug’doyning tuxum hujayrasidagi xromosomalar sonining ayirmasi nechiga teng?

A)21 B)20 C) 11 D) 27

109 Makkajo’xorini 2 mm2 joylashgan ildiz tukchalaridagi jami xromasomalar sonini aniqlang.

A) 28000 B) 26000 C) 24000 D) 20000

110 . Makkajo’xorini 2 mm2 joylashgan ildiz tukchalaridagi jami autasoma xromasomalar sonini aniqlang.

A) 28000 B) 26000 C) 24000 D) 25200

111. Beda o'simligi hujayralarida yoruglik

energiyasi hisobiga va aerob sharoitda 465
molekula ATF sintezlangan bolsa, shu vaqt
oralig'ida o'simlik hujayralari dissimilyatsiya
jarayonida sintezlangan ATFda toplanga energiya
miqdorini (kJ) aniqlang.
A) 16000 B) 18000
C)16800 D)18600

112. Ekologik piramida fitoplanktonlar,

zooplanktonlar, mayda baliqlar, yirik baliqlar,
tyulen va ayiqdan iborat. Ayiqning massasi 800 kg
bo'lsa, zooplanktonlarning biomassasini aniqlang.
A) 80000t B)8000t C) 800000 kg D) 80000 kg

113. Ekologik pyramida fitoplanktonlar,

zooplanktonlar, mayda baliqlar, yirik baliqlar,
tyulen va ayiqdan iborat. Ayiqning massasi 800 kg
bolsa, piramidaning umumiy biomassasini aniqlang.
A) 8888,81 B) 8888,8 kg
C) 88888,81 D) 88888,8 kg