Question

Genes C and D are located on opposite ends of a chromosome that is undergoing crossing-over during meiosis. Which of the following outcomes is likely to be true?
A. Recombination rates for genes C and D will likely exceed 50%.
B. Genes C and D have an increased likeilihood of being inherited as a inkage group.
C. Genes C and D have an increased likelihood of undergoing recombination.
D. Both of these answer are true: genes C and D have an increased likelihood of being inherited as a linkage group AND recombination rates for genes C and D will likely exceed 50%.

Answer 1

Answer:

C. Genes C and D have an increased likelihood of undergoing recombination

Explanation:

Recombination in genetics is the phenomenon responsible for genetic diversity in species of organisms. It is the process whereby the DNA (carrying genes) are rearranged in a new way on a chromosome. It is when genes are recombined during meiosis or gamete formation.

However, recombination is only possible between two different chromosomal segments or same chromosomal segments that are far apart i.e. unlinked. The farther apart two genes are on a chromosome, the greater the chance for recombination to occur. It is, however, not possible for the recombination frequency of two genes to exceed 50% i.e. 50% is the maximum.

Genes C and D are located far on opposite ends of the same chromosome, which means that there is a likelihood or chance that recombination will occur between them. They cannot exceed 50% recombination rate