A pure line of plants of genotype a/a;b/b;c/c;d/d;e/e (all recessive to wild type)was crossed to a wild type.One F₁ individual expressed the recessive alleles d and e.This individual arose most likely from: A)a deletion in the quadruple homozygous recessive parent. B)a deletion in the wild-type parent. C)a gene mutation in the wild-type parent. D)position effect variegation in the F₁. E)a reversion in the quadruple homozygous recessive parent.

Question

Quizplus · Accepted Answer

A deletion in the wild-type parent could remove the dominant alleles, allowing the recessive alleles d and e to be expressed in the offspring. This is a more likely explanation than the other options because it directly affects the expression of the recessive traits by removing the corresponding dominant alleles.

A Pure Line of Plants of Genotype A/a;b/b;c/c;d/d;e/e (All Recessive