Explain the relationship between crossing over and genetic variation.

Crossing over produces modern combinations of alleles. Not unused alleles but unused combinations which can result in modern phenotypes or expanded assortment of phenotypes. This way the there's expanded genotype/phenotype variety but the genuine qualities are still the same ones.

Crossing over is the process by which genetic material is exchanged by non-sister chromatids during meiosis.

Crossing over results in a new combination of genetic information for the cell for a specific trait.

Crossing over ensures that organisms are not identical from generation to generation.

Genetic recombination allows for a variation in genetic material that is passed through the generations.

Explanation:

of those who start drinking before they're 15 will develop alcohol dependence

the answer is: reproductively

i think i spelled it wrong lol

anyways hope i

-lavira: )