Question

The Mississippi Bippy is a hypothetical animal favored by some geneticists. In this animal amiable (A) is dominant to nasty (a), lazy (L) is dominant to active (l), and crazy (C) is dominant to sane (c). An amiable, lazy, but sane female is crossed with a nasty, active, but crazy male and all of the F₁ progeny are found to be amiable, lazy, and crazy. The testcross of an F₁ female with a nasty, active, and sane male gave the following results:

Phenotype	#
amiable, lazy, crazy	56
amiable, lazy, sane	413
amiable, active, crazy	1
amiable, active, sane	22
nasty, lazy, crazy	24
nasty, lazy, sane	3
nasty, active, crazy	421
nasty, active, sane	60

a) (1pt) Draw out the crosses (i.e. indicate the genotypes of the parents).

b) (1pt) What are the genotypes of the progeny.

c) (1pt) Construct a genetic map showing the map order and the distances between the genes.

d) (1pt) Do the data show evidence of interference? If so, how much is there?

Answer 1