Question

as the chromosome pairs line up during prophase i, some material from the chromatids switch to the exact same position on the other chromosomes. this exchange can happen multiple times on the same pair of chromosomes. the diagram shows crossing over and the resulting gametes. crossing over increases genetic diversity because it ensures that offspring receive the dominant alleles for traits. crossing over increases genetic diversity because it prevents genetic mutations from occurring within the genes. crossing over increases genetic diversity because it results in new combinations of genes on each chromosome. crossing over increases genetic diversity because it creates an uneven amount of genetic material on the chromatids.

Explanation:

Crossing - over occurs during meiosis. It involves the exchange of genetic material between homologous chromosomes. This exchange leads to new combinations of genes on each chromosome. Genetic diversity is increased because offspring receive chromosomes with novel gene combinations, not because of dominant alleles (dominant and recessive alleles are just forms of genes, and crossing - over is about recombination, not dominance), not because it prevents mutations (crossing - over is a form of recombination, not a mutation - prevention mechanism), and not because of an uneven amount of genetic material (the amount of genetic material is conserved during crossing - over as it is an exchange, not a gain or loss).

Answer:

Crossing over increases genetic diversity because it results in new combinations of genes on each chromosome.