What type of allele is often detected as a distortion in segregation ratios, where one class of expected progeny is missing?
A)dominant negative allele
B)temperature-sensitive allele
C)lethal allele
D)partial dominance
E)incomplete penetrance

Question

Quizplus · Accepted Answer

Lethal alleles can cause one class of expected progeny to be missing, which results in a distortion in segregation ratios. This occurs because homozygotes for the lethal allele die during development, and thus the expected phenotypic ratio is disrupted. Dominant negative alleles, temperature-sensitive alleles, partial dominance, and incomplete penetrance may also affect segregation ratios, but they do not necessarily cause the absence of a specific class of progeny.

What Type of Allele Is Often Detected as a Distortion