Question 1
Assume that a cross is made between
AaBb and
aabb plants and that the offspring occur in the following numbers: 106
AaBb, 48
Aabb, 52
aaBb, 94
aabb. These results are consistent with what arrangement of genes?
Question 2
In the fruit fly,
Drosophila melanogaster, a spineless (no wing bristles) female fly is mated to a male that is claret (dark eyes) and hairless (no thoracic bristles). Phenotypically wild-type F
1 female progeny were mated to fully homozygous (mutant) males, and the following progeny (1000 total) were observed:
| a) | Which gene is in the middle? |
| b) | With respect to the three genes mentioned in the problem, what are the genotypes of the |
homozygous parents used in making the phenotypically wild-type F
1 heterozygote?
| c) | What are the map distances between the three genes? A correct formula with the values |
"plugged in" for each distance will be sufficient.
| d) | What is the coefficient of coincidence? A correct formula with the values "plugged in" will be |
sufficient.
The Antennapedia mutation in Drosophila
Female in Dominican Pod, 2005
Canvasback - female with ducklings
Muscle male/female
Disorders of the Female Reproductive System