In pea plants, purple flowers (P) are dominant to white (p). The Punnett square shows a Pp x Pp cross. What is the probability an offspring has white flowers?

In guinea pigs, black fur (B) is dominant to white (b). The square shows a Bb x bb cross. What is the probability an offspring has black fur?

In pea plants, tall (T) is dominant to short (t). The square shows a Tt x Tt cross. What is the probability an offspring plant is tall?

In fruit flies, red eyes (R) are dominant to sepia eyes (r). The square shows an RR x rr cross. What is the probability an offspring fly has red eyes?

In cattle, being hornless (P) is dominant to horned (p). The square shows a Pp x Pp cross. What is the probability an offspring calf is heterozygous?

In corn, purple kernels (K) are dominant to yellow (k). The square shows a KK x Kk cross. What is the probability a kernel is yellow?

In mice, gray fur (G) is dominant to white (g). The square shows a Gg x Gg cross. What is the probability an offspring is homozygous, either GG or gg?

In dogs, black coat (B) is dominant to yellow (b). The square shows a Bb x Bb cross. What is the probability a puppy has a yellow coat?

In pea plants, green pods (G) are dominant to yellow pods (g). The square shows a GG x gg cross. What is the probability an offspring carries a recessive g allele?

In guinea pigs, rough hair (R) is dominant to smooth (r). The square shows an Rr x Rr cross. What is the probability an offspring has rough hair?

In rabbits, black fur (B) is dominant to brown fur (b). A BB rabbit is crossed with a bb rabbit. What genotypes appear among their offspring?

In pea plants, tall (T) is dominant to short (t). A Tt plant is crossed with a tt plant. What genotypes appear among the offspring?

In fruit flies, red eyes (R) are dominant to sepia (r). Two Rr flies are crossed. What genotype ratio does the Punnett square predict among the offspring?

In cattle, hornless (P) is dominant to horned (p). A PP bull is bred to a Pp cow. What genotypes appear among the calves?

In mice, gray fur (G) is dominant to white (g). Two white mice are bred together. What genotype do their offspring have?

In corn, purple kernels (K) are dominant to yellow (k). Two KK plants are crossed. Which statement describes the kernels on the offspring plants?

In dogs, black coat (B) is dominant to yellow (b). A Bb dog is bred to a bb dog. Which genotype cannot appear among the puppies?

In pea plants, purple flowers (P) are dominant to white (p). Two Pp plants are crossed. What fraction of the offspring are predicted to be heterozygous?

In fruit flies, red eyes (R) are dominant to sepia (r). A sepia-eyed fly is crossed with an Rr fly. What genotypes appear among the offspring?

In rabbits, black fur (B) is dominant to brown (b). Two heterozygous black rabbits are bred. Every offspring genotype in the square carries at least one B allele.

In horses, a black coat (B) is dominant to chestnut (b). A black stallion is bred to chestnut mares, and 12 of the 24 foals are chestnut. Which cross produced these foals?

In pea plants, tall (T) is dominant to short (t). Two plants are crossed, and about three quarters of the offspring are tall while one quarter are short. Which cross produced them?

In guinea pigs, black fur (B) is dominant to white (b). A black guinea pig is crossed with a white one, and all 30 offspring are black. What is the black parent's genotype?

In mice, gray fur (G) is dominant to white (g). A Gg mouse is crossed with a GG mouse. What fraction of the pups are expected to be Gg?

In cattle, hornless (P) is dominant to horned (p). Two hornless parents produce a horned calf. What must be true of both parents?

In fruit flies, red eyes (R) are dominant to sepia (r). Two flies are crossed, and about half the offspring have sepia eyes. Which cross is this?

In pea plants, purple flowers (P) are dominant to white (p). A purple plant is crossed with a white plant, and 20 of the 40 offspring are white. What is the purple parent's genotype?

In dogs, black coat (B) is dominant to yellow (b). Two black dogs have a litter of eight, and one puppy is yellow. What does that single yellow puppy show?

In corn, purple kernels (K) are dominant to yellow (k). A breeder wants a cross that can never produce a yellow kernel. Which cross should the breeder use?

In guinea pigs, rough hair (R) is dominant to smooth (r). All four boxes of a Punnett square show Rr. What were the parents' genotypes?

In pea plants, tall (T) is dominant to short (t). Two Tt plants are crossed and 12 seeds grow. The square predicts a 3 to 1 ratio of tall to short. What does that predict for the seedlings?

In rabbits, black fur (B) is dominant to brown (b). A Bb rabbit is bred to a bb rabbit and eight kits are born. About how many kits are predicted to be brown?

In tomatoes, red fruit (R) is dominant to yellow (r). Two Rr plants are crossed and 100 fruits are produced. About how many are predicted to be yellow?

In mice, gray fur (G) is dominant to white (g). Two Gg mice produce 40 offspring over several litters. About how many are predicted to be gray?

In cattle, hornless (P) is dominant to horned (p). A Pp bull is bred to horned cows, producing 20 calves. About how many calves are predicted to be horned?

In fruit flies, red eyes (R) are dominant to sepia (r). Two Rr flies produce 200 offspring. About how many are predicted to have sepia eyes?

In dogs, black coat (B) is dominant to yellow (b). Two Bb dogs have a litter of four puppies. The Punnett square guarantees that exactly one puppy will be yellow.

In corn, purple kernels (K) are dominant to yellow (k). Two Kk plants are crossed and one ear carries 400 kernels. About how many kernels are predicted to be purple?

In pea plants, tall (T) is dominant to short (t). A Tt plant is crossed with a tt plant and 60 seeds grow. About how many seedlings are predicted to be short?

Two Bb guinea pigs produce eight young: five black and three white. The Punnett square predicted six black and two white. What best explains the difference?