1. The problem statement, all variables and given/known data A germ cell in the male part of a plant (anther) (n=2) produces 4 haploid pollen cells. Assume that the gene for flower color (F) is on chromosome 1 and the gene for leaf color (L) is on chromosome 2. If a plant contains two different alleles of the flower color gene (F and f) and 2 different alleles of the leaf color gene (L and l): A) what are the genotype of all possible pollen grains? B) when a single germ cell undergoes meiosis to produce 4 pollen grains, how many will have each genotype? C) what will be the ratio of F to f in the entire population of pollen grains? D) if a cross-over even occurs in meiosis I, will this influence the genotypes of the pollen grains? 3. The attempt at a solution I just posted the whole question so it's clear. But I know that (assuming there isn't any cross-over) A is 2^2, or 4 different genotypes. I'm a little unsure about B- I think that for a single germ cell, since each pair of the four haploid cells it produces are identical to each other (again assuming no cross-over, since I don't know any other way to approach the question) then the 4 pollen grains will have 2 genotypes (i.e., 2 will have one genotype and 2 will have another) For C, I just thought it was 1:1? It doesn't mention a phenotype or anything, so I don't think dominance has anything to do with it. I'm a bit confused about the question. For D, I'm confused because I don't really understand how crossing-over affects the genotypes or phenotypes of a population. I know that homologous chromosomes synapse and exchange genetic information like my book says, yadda yadda, but what does that actually do? Does it create a brand new allele (which would then change the genotype and possibly the phenotype)? So if cross-over occurs, the plants will no longer be L or l, for example, but some new hybrid of M or m or something? So, in a sense, are there a huge number of possible alleles? Or is that not true at all? Thanks in advance for any help.