During meiosis, genetic recombination results because – a: Genes from different species can freely mix together.

b: Chromosomes assort independently and crossing-over occurs.

c: Gene mutation occurs more frequently than at other times.

d: Cells divide only once, resulting in genetically identical cells.

b: Chromosomes assort independently and crossing-over occurs.

•Crossing-over results in genetic recombination by producing a new mixture of genetic material. Each homologous pair consists of four chromatids, because each chromosome in the pair had replicated before meiosis began. Homologous pairs (tetrads) are still paired together and arrange in the middle of the cell.

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