Tuxumdonda urug'lanish jarayoni sodir bo'lganidan so'ng tuxum hujayra bachadon.,-■ nayiga o'tib, rivojlanishni davom ettiradi

(v19/20-122-25) Aa genotipli organizm bilan o'tkazilgan tahliliy chatishtirish natijalariga oid to'g'ri ma'lumotlarni aniqlang. 1) retsessiv gomozigota genotiplar avlodning 75% ini tashkil etadi; 2) genlarning birikish hodisasi kuzatiladi; 3) fenotip bp'yicha hisbat 1:1 bo'ladi; 4) avlodning 50% dominant belgiga ega; 5) ota-onalarning ikkinchisi,aa genotipga ega.

A)1,3 B)1,2 0 4,5 D)2,3

28. 
    (V20/21-115-16) Duragay chatishtirishda digeterozigota organizmlar o'zaro chatishtirishda F, da har ikki belgining to'liq (1), har ikki belgining chala (2) hamda ikki belgining biri to'liq, biri chala (3) dominantlik holatida irsiylanganda hosil bo'lishi mumkin bo'lgan fenotipik sinflar nisbatini belgilang?
    

1. 
   9:6:1; b) 1:2;2:4:1:2:1:2:1; c) 9:7 d)3:6:3:1:2:1;e) 9:3:4; f)9:3:3:1;
   

j) 3:2:1:3:6:1; h) 1:1:1:1:1:1:1:1.

1. 
   1-c; 2-h; 3-d
   
2. 
   1-f; 2-b; 3-d, j
   
3. 
   1-f; 2-b; 3-a, c, d,e,f,j
   
4. 
   1-a, c, f; 2-j, h; 3-d
   

29.