A homologous chromosome pair is best described as two chromosomes having
a. the same genes in the same order but possibly having different alleles of those genes.
b. the same alleles of the same genes in the same order.
c. different genes in the same order and possibly having different alleles of some genes.
d. different alleles of the same genes arranged in a different order.
e. an identical DNA sequence.
A
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Inbreeding increases the likelyhood that an individual will become homozygous for any given gene. Inbreeding may have negative consequences with regard to recessive alleles. The diagram above shows inbreeding between _________ which could lower the fitness of the homozygote. This lowering of fitness because of inbreeding is called __________.
A. siblings; inbreeding depression.
B. cousins; inbreeding depression.
C. siblings; puma concolor cory.
D. cousins; genetic drift.
E. siblings; sexual selection.
The major cause of male infertility is ________________
A. varicocele D. semen disorders B. undescended testicles E. obstructions C. testicular failure
Which phase is marked by the arrival of chromosomes at the poles?
ATP is composed of a sugar, the organic base adenine, and:
A. phenylalanine B. three nitrate groups C. two phosphate groups D. three phosphate groups