In organisms that reproduce sexually, inherited variation is due mostly to

EVIDENCE FOR EVOLUTION

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Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]

A	mutations during gamete formation.
B	polygenic traits.
C	gene shuffling during gamete formation.
D	the effects of radiation.

Explanation:

Detailed explanation-1: -Sexual reproduction has the potential to produce tremendous genetic variation in offspring. This variation is due to independent assortment and crossing-over during meiosis, and random union of gametes during fertilization.

Detailed explanation-2: -Specifically, meiosis creates new combinations of genetic material in each of the four daughter cells. These new combinations result from the exchange of DNA between paired chromosomes. Such exchange means that the gametes produced through meiosis exhibit an amazing range of genetic variation.

Detailed explanation-3: -Moreover, homologous DNA segments swap in bits and pieces during the shuffling process, altering the inherent genetic information. The alteration in the DNA sequence could result in new alleles or novel combinations of different genes.

Detailed explanation-4: -Two different processes contribute to gene shuffling: independent assortment and crossing over. During meiosis I, homologous chromosomes pair up with each other. When the homologs are divided into daughter cells, the chromosomes are sorted randomly into daughter cells.

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