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Question

Biology Question on Non-Mendelian Genetics

Primary source of allelic variation is

A

Independent assortment

B

Recombination

C

Mutation

D

Polyploidy

Answer

Recombination

Explanation

Solution

Recombination is the primary source of allelic variation. The alleles of parental linkage groups separate and new association of alleles are formed in the gamete cells through recombination. Morgan proposed that crossing over of alleles occurred as a result of the breakage and reunion of homologous chromosomes during meiosisI-I.