Albinism in snails, as described in the text, can involve 2 loci with homozygous recessive alleles at either loci resulting in albino coloration. Brown snails arise from functional genes at both loci. Assume we found another color variation in that species of snail that is purple. Crossing a purple snail with albino snail #1 results in all brown F1 and F2 with 4/16 albino, 9/16 brown, and 3/16 purple. Crossing the purple snail with albino snail #2 results in all purple F1 and F2 with ¾ purple and ¼ albino.
1. Explain the interaction of the genes.
2. What is the genotype of the purple snail?
3. What is the genotype of albino snail #1?
4. What is the genotype of albino snail #2?
5. What are the genotypes of the F1 and F2 offspring resulting from the albino snail #1 cross?
6. What are the genotypes of the F1 and F2 offspring resulting from the albino snail #2 cross?