Question

explain the relationship between crossing over and genetic variation.

Explanation:

Crossing - over occurs during meiosis. It involves the exchange of genetic material between homologous chromosomes. This exchange leads to new combinations of alleles on the chromosomes. Since genetic variation is the presence of different genetic combinations in a population, crossing - over increases genetic variation by creating novel allele combinations in gametes. When these gametes combine during fertilization, offspring with unique genetic make - ups are produced.

Answer:

Crossing - over increases genetic variation. It does so by exchanging genetic material between homologous chromosomes during meiosis, creating new allele combinations in gametes. These new combinations, when passed on during fertilization, result in offspring with unique genetic traits, thus contributing to the genetic variation within a population.