3. For Dalmatian dogs, the spotted condition is dominant over non-
S
spotted.
(a) Using a Punnett square, show the results of a cross between
two heterozygous parents.
(b) A spotted female Dalmatian dog mates with an unknown
father. From the appearance of the pups, the owner concludes
that the male was a Dalmatian. The owner notes that the
female had six pups, three spotted and three non-spotted.
What are the genotype and phenotype of the unknown male?
(continued]