CELL DIVISION
MEIOSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Condensation of chromatin during meiosis I
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Recombination between homologous chromatids during meiosis I
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Alignment of sister chromatids at the metaphase plate during meiosis II
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Separation of sister chromatids during meiosis II
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Detailed explanation-1: -Even though humans are approximately 99.9% identical in their genetic makeup, an incredible amount of variation is seen among individuals of the species. This genetic variation is greatly influenced by the process of meiosis.
Detailed explanation-2: -In humans, the main cause is genetic drift. Serial founder effects and past small population size (increasing the likelihood of genetic drift) may have had an important influence in neutral differences between populations.
Detailed explanation-3: -Sources of Genetic Variation Gene duplication, mutation, or other processes can produce new genes and alleles and increase genetic variation. New genetic variation can be created within generations in a population, so a population with rapid reproduction rates will probably have high genetic variation.
Detailed explanation-4: -Genetic variations can arise from gene variants (also called mutations) or from a normal process in which genetic material is rearranged as a cell is getting ready to divide (known as genetic recombination). Genetic variations that alter gene activity or protein function can introduce different traits in an organism.
Detailed explanation-5: -Between any two humans, the amount of genetic variation-biochemical individuality-is about . 1 percent. This means that about one base pair out of every 1, 000 will be different between any two individuals.