Geneticists Have Discovered the Existence of Meiotic Drive Genes, Which

question 229

Multiple Choice

Geneticists have discovered the existence of meiotic drive genes, which have alleles that, when present in a heterozygous state, are able to become incorporated into much more than 50 percent of the gametes.As a result, the offspring ratios are not what Mendel would have predicted.Suppose that the short allele is a meiotic drive gene, and 80 percent of the gametes from a heterozygous individual with tall and short alleles contain short alleles.If tall is dominant to short, what percent of individuals from a cross between a heterozygous tall individual and a homozygous recessive individual will be tall?

• A) 20 percent
• B) 40 percent
• C) 50 percent
• D) 60 percent
• E) 80 percent

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