Crossing Over is More Likely to Separate Genes on a Chromatid

Question

Crossing over is more likely to separate genes on a chromatid if they are
A) close together.
B) mutated genes.
C) far apart.
D) recessive genes.
E) dominant genes.

Accepted Answer

Crossing over occurs during meiosis when homologous chromosomes exchange genetic information. This means that genes that are closer together on a chromosome are less likely to be separated by crossing over than genes that are further apart. Therefore, choice C is the best answer as genes that are far apart on a chromatid are more likely to be separated by crossing over. Mutations, recessive and dominant genes do not affect the likelihood of separation by crossing over.