Question

Which mechanism does NOT contribute to reshuffling of alleles in sexual reproduction in eukaryotes?

	A.	mutations.
	B.	independent assortment of chromosomes.
	C.	crossing over.
	D.	fertilisation

Answer 1

ANSWER - CORRECT OPTION IS A

in sexual reproduction in eukaryotes there does reshuffling of chromosomes takes place, as in independent assortment out of the two pairs of chromosomal alleles one pair is randomly transferred to the next generation, ie there is random reshuffling takes place.

in crossing over also, the alleles are crossed and recombination takes place, and thus one can say reshuffling occurs, while in fertilisation, there occurs a mechanism in which one set of chromosomal pairs which were randomly independently assorted is fused to the other set of chromosome of the opoosite sex and result into fusion and these chromosomes are randomly choosen during the whole process.

it is only the mutation which does not have any role in the sexual reproduction in the eukaryotes and there no reshuffling occurs, and the mutation is passed as it is , if it a germline mutation and if it is not, ie, if it is somatic , it does not appear in the next generation.

hence, correct answer is A