Meiosis |
Increased variationThe two ways where meiosis increases genetic diversity in a species are crossing over and independent assortment of homologous chromosomes. Crossing overtakes place during meiosis when two chromatids exchange DNA material.
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Increased genetic variationWhen homologous chromosomes form pairs during prophase of meiosis ,crossing-over can occur. Crossing-over is the exchange of genetic material between non-sister chromatids of homologous chromosomes. It results in new combinations of genes on each chromosome
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Mutationmutations occur at some time during a person's life and are present only in certain cells, not in every cell in the body.
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Mutation based on effectThere are effects at the cellular level
When red blood cells carrying mutant hemoglobin are deprived of oxygen, they become "sickle-shaped" instead of the usual round shape |