"a man with genotype bb and a woman wth genotype BB have four children. how many of the children are likely to have blue eyes"

No children will have blue eyes all of them carry brown eyes only.

Explanation:

The cross between a male with bb genotype and female with BB genotype will be as follows :

The gametes will be formed

male: b and b

female: B and B

By Punnett square:

        B          B

b       Bb        Bb

b       Bb        Bb

As all the offspring will have a heterozygous condition with dominant B (Brown) and recessive b( blue) so there are no offspring will be with the phenotype of the blue eyes.

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pesticide