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What is an independent assortment?
Random positioning/segregation of tetrads in the middle of the cell during metaphase I
What is crossing over?
The exchange of genetic material between non-sister chromatids of homologous chromosomes during Prophase I
How many crossovers can occur per chromosome?
Up to 2-3 crossovers per chromosome
What is random fertilization?
Random fusion of any sperm with any ovum to form a zygote with about 70 trillion possible diploid combinations.