You Discover a New Allele of a Gene Important for Tail

question 50

Multiple Choice

You discover a new allele of a gene important for tail formation in mice. WT mice have long tails, but mice heterozygous for the allele have short tails. When you cross two heterozygous mice together, you obtain a 2:1 ratio of short-tailed mice to long-tailed mice. None of the short-tailed progeny are homozygous. What type of allele results in short tails?

• A)dominant negative allele
• B)temperature-sensitive allele
• C)lethal allele
• D)partially dominant allele
• E)incompletely penetrant allele

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