How Do Meiosis And Sexual Reproduction (fertilization) Produce Offspring That Differ Genetically From The Parents? Talk About Meiosis And Fertilization.

This is what I have. Is right or wrong? Is there anything to be added? Meiosis maintains genetic diversity contained by two ways: 1) Genetic recombination: The exchange of genetic material between sister chromatids 2) By random assortment of paternal and caring chromosomes and the alleles of genes they contain.


Answer:
What you've got is correct, except you could add one thing to the first point...

You said sister chromatids exchange DNA, which is true, and this happens in second meiosis division, or meiosis 2. However this also happens during the first division of meiosis, between the pairs of chromsomes surrounded by bivalents.

You could add as another point...

3. Random fusion of gametes: Since during sexual reproduction only 2 random gametes fuse to produce an spawn, this creates unique combination of alleles.

The purpose of sexual reproduction  is to create variety within the species as the daughter inherit genes from two different individuals, usually unrelated, and so are unique and not a clone of either parent .

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