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Sex Determination in Human

In a human be...

Question

In a human being blue are recessive to brown eye. If a boy has brown eyes but is mother has blue eyes then what will be the phenotype and genotype of his father

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Solution

Blue eye is recessive bb.
Mother is with blue eyes so her genotype is bb and she is able to produce b and b gametes.
The boy is with brown eyes which means he would be Bb or BB.

The genotype and phenotype of the father would be either BB homozygous dominant brown or Heterozygous dominant Bb Brown.

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