Question

what does a higher percentage of crossing over indicate about gene distance? the genes are unrelated the genes are farther apart the genes are closer together the genes are identical

Explanation:

In genetics, crossing - over (recombination) frequency is related to gene distance. The basic principle is that the farther apart two genes are on a chromosome, the more likely they are to undergo crossing - over. This is because there is a larger region between them where the exchange of genetic material (crossing - over) can occur. If genes were unrelated (no linkage), they would assort independently (Mendel's law of independent assortment), but this is not about crossing - over percentage and gene distance. If genes were closer together, the crossing - over percentage would be lower as there is less space for recombination. Identical genes would not really be a case for crossing - over in terms of distance - related crossing - over percentage variation as described in the context of gene mapping.

Answer:

the genes are farther apart