Webster's New World Medical Dictionary

recombinant clone
A clone that contains
recombinant DNA.
recombinant DNA molecules
A combination of
DNA molecules of different origin that are joined
using recombinant DNA technology.
recombinant DNA technology
A series of pro-
cedures that are used to join together (recombine)
DNA segments. A recombinant DNA molecule is
constructed from segments of two or more different
DNA molecules. Under certain conditions, a recom-
binant DNA molecule can enter a cell and replicate
there, either on its own or after it has been inte-
grated into a chromosome.
recombination
The trading of fragments of
genetic material between chromosomes before the
egg and sperm cells are created. Key features of
recombination include the point-to-point associa-
tion of paired chromosomes (synapsis), followed by
the visible exchange of segments (crossing over) at
X-shaped crosspoints (chiasmata). Recombination
is the principal way of creating genetic diversity
between generations. Recombination ensures that
children receive a different genetic makeup than
their parents.
Recombivax-HB
A vaccine that stimulates the
body’s immune system to produce antibodies against
the hepatitis B virus. See also 
hepatitis B; hepatitis
B immunization.
recrudescence
Reappearance, as of a rash or
arthritis.
rectal 1
Having to do with the rectum.
2
Informally, digital rectal exam.
rectal cancer
See 
cancer, rectal.
rectal exam, digital
See 
digital rectal exam.
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rectal exam, digital
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