By conducting testcrosses, researchers have found that the apple has 17 linkage groups. How many chromosomes would you expect to find in leaf cells?

For genes which have multiple alleles, the relationships between those alleles can be a variety of types of dominant/recessive relationships.  

True-breeding tall plants with white flowers are crossed to true-breeding dwarf plants with purple flowers. The F1 plants were tall with purple flowers. The genes that affect these traits independently assort. If the F1 plants were allowed to self-fertilize, the expected ratio of the F2 generation would be

The binomial expansion equation is used to solve problems in which

Assuming that 50% of the offspring are male and 50% are female, what is the probability of this couple having a son with long index fingers?

Two genes are 18 map units apart. In a testcross, what percentage of offspring is expected to be recombinants?

The phenomenon of linkage defies

Two genes are 22 map units apart on the same chromosome. A true-breeding GGhh individual is crossed to a true-breeding ggHH individual. The F1 offspring are mated to gghh individuals. If this testcross produces 1000 offspring, how many of them would you expect to be GgHh? 

Assuming that 50% of the offspring are male and 50% are female, what is the probability of this couple having a daughter with long index fingers?

Which of the following is not a molecular explanation for dominance?