Suppose an Individual Is Heterozygous for Alternate Alleles of Gene

question 6

Multiple Choice

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.

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