Suppose an individual is heterozygous for alternate alleles of gene A (Aa).Under what conditions would a crossover in a somatic cell of this individual lead to a clone of cells that are homozygous for a? (Pick the most precise answer. )
A)The crossover would have to occur between the A locus and the centromere and involve two homologous (nonsister)chromatids.
B)The crossover would have to occur between the A locus and the end of the chromosome and involve two homologous (nonsister)chromatids.
C)The crossover would have to occur between the A locus and the end of the chromosome and involve two nonhomologous chromosomes.
D)The crossover would have to occur between the A locus and the centromere and involve two sister chromatids.

Question

Quizplus · Accepted Answer

Crossovers between the A locus and the centromere involving two homologous (nonsister) chromatids can lead to a scenario where a clone of cells becomes homozygous for a, as this type of crossover can result in the exchange of genetic material that includes the A locus, potentially segregating alleles in a way that a clone of cells could inherit two a alleles.

Suppose an Individual Is Heterozygous for Alternate Alleles of Gene