Drosophila melanogaster eye color mutations

[MissDee]

Hello,

I'm a little lost with how to approach this problem. Could someone please point me in a general direction with how to approach this? Thank you!


The word problem is:
1.) In fruit flies (Drosophila melanogaster) the most common eye color is red. A mutation (or allele) of the gene for eye color produces white eyes. The gene is located on the X chromosome.

a.) What is the probability that a heterozygous red-eyed female fruit fly mated with a white-eyed male will produce any white-eyed offspring?
b.) What is the probability that the mating in part a will produce any white-eyed females?
c.) What is the probability that this mating will produce any white-eyed males?

[canalon]

Punnet squares are the answer to your question

[fiona1985]

The genome of D. melanogaster (sequenced in 2000, and curated at the FlyBase database[15]) contains four pairs of chromosomes: an X/Y pair, and three autosomes labeled 2, 3, and 4. The fourth chromosome is so tiny that it is often ignored, aside from its important eyeless gene. The D. melanogaster sequenced genome of 165 million base pairs has been annotated[17] and contains approximately 13,767 protein-coding genes, which comprise ~20% of the genome out of a total of an estimated 14,000 genes.