NEET BIOLOGY

CELL STRUCTURES AND FUNCTION

CELL DIVISION

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which of the following DOESN’T increase genetic variation?
A
Sexual Reproduction
B
Mitosis
C
Meiosis
D
Independent Assortment
Explanation: 

Detailed explanation-1: -Mitosis builds a person with an identical set of chromosomes in every cell. And meiosis generates reproductive cells with new combinations of gene variations. Chromosomes are sometimes gained, lost, or rearranged during meiosis and fertilization, causing people to have genetic disorders.

Detailed explanation-2: -Because the genes contained in the duplicate chromosomes are transferred to each successive cellular generation, all mitotic progeny are genetically similar.

Detailed explanation-3: -Genetic variation is increased by meiosis Because of recombination and independent assortment in meiosis, each gamete contains a different set of DNA. This produces a unique combination of genes in the resulting zygote. Recombination or crossing over occurs during prophase I.

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