Biologists use Punnett squares to represent the ways that genes can be passed from parent to offspring. In the Punnett squares at right, B stands for brown eyes, a dominant trait, whereas b stands for blue eyes, a recessive trait. E represents brown hair, the dominant trait, whereas e represents the recessive trait, blonde hair. If a dominant gene is present, a recessive trait will be hidden. The first row and column represent the parents' genes. The rest of the squares represent the possible pairs of genes the parents could pass on to their offspring.
a. In Table 1, both parents are brown-eyed, but one parent has a Bb gene combination, whereas the other has a BB gene combination. What is the probability of a blue-eyed (bb) offspring?

b. In Table 2, both parents are brown-eyed, each having the Bb gene combination. What is the probability of a blue-eyed (bb) offspring?

c. In Table 3, one parent is blue-eyed (bb), whereas the other is brown-eyed (Bb). What is the probability of a blue-eyed (bb) offspring?

d. According to Table 4, is it possible for two blue-eyed parents to have a child with brown eyes? Explain.

e. In Table 5, one parent is brown-eyed and brown-haired (BbEE). The other parent is brown-eyed and blonde-haired (Bbee). What is the probability of a blue-eyed, brown-haired child?

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Table 1 B BBBb B | BB | Bb Table 2 Bİb B BBBb b Bb bb Table 3 B BbBb Table 4 Table 5 BE BE bE bE Be BBEe BBEeBbEe BbEe Be BBEe BBEe BbEe BbEe be BbEe BbEe bbE bbEe be BbEe BbEe bbE bbEe