Question

Crossing over is more likely to separate genes on a chromosome if they are:

Select one:
a. Close together
b. Recessive genes
c. Far apart
d. Dominant genes
e. Mutated genes

Answer 1

Crossing over most likely separates genes that are far apart on a chromosome, with increased distance resulting in a higher chance of recombinant gametes.

Step-by-step explanation:

Crossing over is more likely to separate genes on a chromosome if they are far apart. Genes that are located close together on the same chromosome tend to be inherited together because the probability of a crossover event occurring between them is lower.

As the distance between two genes increases, the likelihood of crossing-over increases, therefore the genes behave more as if they are on separate chromosomes, leading to a higher chance of recombinant gametes, which are different from the parent types.

Geneticists construct linkage maps using the proportion of these recombinant gametes to measure the genetic distance between linked genes on a chromosome.