L4 GENETIC VARIATION

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4 Terms

1
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What is an independent assortment?

Random positioning/segregation of tetrads in the middle of the cell during metaphase I

2
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What is crossing over?

The exchange of genetic material between non-sister chromatids of homologous chromosomes during Prophase I

3
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How many crossovers can occur per chromosome?

Up to 2-3 crossovers per chromosome

4
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What is random fertilization?

Random fusion of any sperm with any ovum to form a zygote with about 70 trillion possible diploid combinations.