In humans, the allele for brown eyes (B) is dominant to the allele for blue eyes (b). What is the probability that two heterozygous brown-eyed parents will have a child with blue eyes?
Answer: for this question, you need to draw a punnet square. Combining all of the alleles, your phenotypes are as such: BB Bb BB bb. So, the child has a 25% chance of having blue eyes.
