Recombinant Chromatids Have a Mix of Paternal and Maternal Alleles

Question

Recombinant chromatids have a mix of paternal and maternal alleles due to
A) independent assortment.
B) crossing over having happened between the linked genes.
C) persistent linkage of genes on the chromatid.
D) random fertilization of the gametes.
E) point mutations and gene aberrations from replication.

Accepted Answer

Recombinant chromatids result from crossing over events that occur between linked genes on homologous chromosomes. This results in an exchange of genetic material between the chromosomes, leading to a mixing of maternal and paternal alleles on the chromatid. Independent assortment (A), persistent linkage (C), and random fertilization (D) do not directly result in recombinant chromatids. Point mutations and gene aberrations from replication (E) may lead to changes in the genetic material of a single chromatid, but do not lead to mixing of alleles between chromatids.