In general, the frequency with which crossing over occurs between two linked genes depends on what?
a. how far apart they are on the chromosome
b. the phase of meiosis in which the crossing over occurs
c. the characters the genes code for
d. whether the genes are on the x or some other chromosome
e. whether the genes are dominant or recessive

I depends upon whether the original cross involved genes in coupling or repulsion phase.

1. true.2. true.3. true.4. false.5. true.the concept of darwin's theory of evolution involves the idea that there are limited resources in a given living environment and that the organisms which live within have variations in their genetic make up due to random mating. the ones with beneficial genetic variations can express certain traits which give them an upper hand in surviving and reproducing in the said environment compared to ones who may have a more disadvantageous variation in traits. over time, the organisms with an upper hand will survive and reproduce more frequently and pass on their beneficial genes while the others die. the result is evolution, where we observe (usually, but not always) eventually, phenotypic distinct changes.