Homologous Recombination May Result in Gene Conversion When Used to Fix

Multiple Choice

Homologous recombination may result in gene conversion when used to fix double-stranded DNA breaks because

A) sister chromatids are always identical.
B) homologous recombination is prone to errors,potentially causing permanent genetic mutations.
C) strand invasion may introduce new genes onto the damaged chromosome.
D) homologous chromosomes may carry different alleles of the same gene.
E) the Holliday junction may migrate,resulting in loss of genetic material.