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

Multiple Choice

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.