Yes, see the example of 3 skin color loci on pg 251 as an example of polygenic inheritance. Anaphase of Meiosis ONE - homologous chromosomes go to different cells. Anaphase of Meiosis TWO - chromatids separate and go to different cells. Generally the only crossing over that matters is that between non-sister chromatids. If the non-sister chromatids are homozygous for a trait, then there will be no recombination.
Recombination occurs only when non-sister chromatids are heterozygous for a trait.
Recessive, Both are heterozygous for wing length - perhaps Ll and Ll. If he is homozygous A or has type O blood, then he is off the hook on this one.