OBJECTIVE LIFE SCIENCE
EVOLUTION
Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Sexual reproduction
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Crossing over and independent assortment in Meiosis
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Mutations in gamete DNA
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All of these
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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: -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-3: -Sexual reproduction results in genetic variation, or genetic differences, between parents and offspring. Offspring inherit one set of chromosomes from each parent. So, an offspring has a mixture of chromosomes (and alleles) from its two parents. Sexual reproduction also results in genetic variation among siblings.
Detailed explanation-4: -Major causes of variation include mutations, gene flow, and sexual reproduction.
Detailed explanation-5: -The genetic diversity has three different sources: mutation, recombination and immigration of genes.