17. Brown eye color is dominant; blue eye color is recessive. If a brown- eyed man marries a blue-eyed woman and they have a brown-eyed son and a
blue-eyed daughter, we can safely conclude that:
(a) the man is not the true father (b) the man is heterozygous
(c) eye color is sex-linked (d) the man has the genotype for blue
eyes but the phenotype for brown eyes.