In what 2 ways does meiosis provide genetic variation?

In what 2 ways does meiosis provide genetic variation explain how each produces genetic variety?

We have seen that meiosis creates variation three ways: crossing over, mutations caused during crossing over, and independent assortment.

What are two sources of genetic variation in meiosis?

Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism’s offspring).

What two methods cause genetic variation?

Genetic variation can be caused by mutation (which can create entirely new alleles in a population), random mating, random fertilization, and recombination between homologous chromosomes during meiosis (which reshuffles alleles within an organism’s offspring).

Which two ways explain how the process of meiosis produces offspring that are genetically different from the parents?

The two factors are: crossing-over and independent assortment. Crossing over: In Prophase I of Meiosis I, homologous chromosomes line up their chromatids and “cross-over”, or exchange corresponding segments of DNA with each other. This produces genetic variation by allowing more combinations of genes to be produced.

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How do meiosis contributes to genetic variation while mitosis does not?

Assess how meiosis contributes to genetic variation, while mitosis does not. During meiosis, the independent assortment of the pairs of chromosomes and crossing over provide a large amount of genetic variation. Mitosis produces identical cells.

What are two ways to measure the genetic variation of a population?

Using the techniques of molecular biology, what are the two ways of measuring genetic variation in a population? Survey the protein products of genes using gel electrophoresis and compare the DNA sequences of two individuals in a population.

What are the 3 events in meiosis that contribute to genetic variation?

The three main sources of genetic variation arising from sexual reproduction are: Crossing over (in prophase I) Random assortment of chromosomes (in metaphase I) Random fusion of gametes from different parents.

What are two ways that variation can be described?

Variations are classified either as continuous, or quantitative (smoothly grading between two extremes, with the majority of individuals at the centre, as height varies in human populations); or as discontinuous, or qualitative (composed of well-defined classes, as blood groups vary in humans).

What causes genetic variation?

Mutations, the changes in the sequences of genes in DNA, are one source of genetic variation. Another source is gene flow, or the movement of genes between different groups of organisms. Finally, genetic variation can be a result of sexual reproduction, which leads to the creation of new combinations of genes.