Geneticists construct linkage maps of chromosomes by
A)correlating a phenotype to an observable chromosomal abnormality.
B)determining the number of crossovers between genes on different chromosomes.
C)calculating the percent recombination between two genes on the same chromosome.
D)observing the number of genes on a chromosome.

Question

Quizplus · Accepted Answer

Linkage maps are constructed by determining the frequency of crossovers between genes on the same chromosome. The percent recombination between two genes on the same chromosome is proportional to the distance between them, which can be used to construct a linkage map. Option A is incorrect as not all phenotypes have observable chromosomal abnormalities. Option B is incorrect as it refers to crossovers between genes on different chromosomes, not on the same chromosome. Option D is incorrect as the number of genes on a chromosome does not necessarily determine their relative positions on the chromosome.

Geneticists Construct Linkage Maps of Chromosomes by