Question

in human beings brown eyes are dominant over blue eyes. a brown-eyed man whose father was brown-eyed and whose mother was blue eyed married a blue eyed woman whose father and mother both were brown eyed.the couple has a blue-eyed son. for which of the following individuals can you be sure of the genotypes? what are their genotypes? what genotypes are possible for the others?

Answer 1

The possibility of the son having blue eyes is 50% . Since blue eyes are recessive, the wife has 2bs and the dominant husband has 1B and 1b because ! parent had brown eyes and the other had blue. He COULDN'T have had 2Bs because that is not possible based on his parents.