AP BIOLOGY

EVOLUTION

THE ORIGIN OF LIFE

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Which is not true concerning genetic recombination during meiosis?
A
it can only affect the next generation
B
it can increase genetic diversity in the next generation
C
it can cause new forms of a trait to appear in subsequent generations
D
it can cause new traits not found in the parents to appear in the next generation
Explanation: 

Detailed explanation-1: -Does recombination occur in cells other than gametes? Beyond its role in meiosis, recombination is important to somatic cells in eukaryotes because it can be used to help repair broken DNA, even when the break involves both strands of the double helix.

Detailed explanation-2: -Recombination effectively ‘shuffles’ maternal and paternal DNA, creating new combinations of variants in the daughter germ-cells (Figure 2). Figure 2 Recombination contributes to human genetic variation by shuffling parental DNA and creating new combinations of variants.

Detailed explanation-3: -The study of homologous recombination has its historical roots in meiosis. In this context, recombination occurs as a programmed event that culminates in the formation of crossovers, which are essential for accurate chromosome segregation and create new combinations of parental alleles.

Detailed explanation-4: -So, the correct answer is ‘Meiosis produces gametes that contain one complete haploid set of chromosomes’

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