Check Your Understanding

1. There are 2 alleles for the crest characteristic in pigeons: no crest and crest. Crest is recessive. Use a Punnett square to calculate the probability of the offspring of 2 heterozygous parents not having a crest.

2. Explain why males are more likely to have a sex linked disorder than females.

3. Complete a dihybrid cross for a black haired, floppy eared male with the genotype BBee and a brown haired, long eared female with the genotype bbEe. Determine the probability of each phenotype.