Answer to Question #190198 in Genetics for Muhammed

Question

Evaluate how the behaviour of the chromosomes leads to variation in detail

Answer 1

During meiosis, homologous chromosomes (1 from each parent) pair along their lengths. The chromosomes cross over at points called chiasma. At each chiasma, the chromosomes break and rejoin, trading some of their genes. This recombination results in genetic variation.