Problem:

Question 1: Imagine hypothetically that the gender of a reptile is controlled by a single gene with two alleles, designated A and a. The outcome of this trait is affected by the temperature of the environment. When raised in a cooler environment, the dominant A allele confers maleness, and the a allele confers femaleness. However, when raised in a warmer environment, the homozygote aa animal is male. If a heterozygous individual is crossed to a female reptile, what are the proportions of offspring that are male and female when raised in a cool environment? How do the proportions change if the offspring are raised in a warm environment?

Question 2: In the laboratory, a genetics student crossed flies with normal long wings to flies with mutant short wings, which the student believed to be a recessive trait. In the F1 generation, all flies had long wings. In the F2 generation, the following results were obtained:

792 long-winged flies and 208 short-winged flies

Question 3: Is this gene behaving according to standard Mendelian genetics? What do the data suggest about the short-winged mutation?

Any ideas? Or better yet, pointers to places where this has already been answered?