In humans, hair color is controlled by two interactinggenes. The same pigment, melanin, is present in bothbrown-haired and blond-haired people, but brown hairhas much more of it. Brown hair (B ) is dominant to blond(b). Whether any melanin can be synthesized depends onanother gene. The dominant form of this second gene (M )allows melanin synthesis; the recessive form (m) preventsmelanin synthesis. Homozygous recessives (mm) are albino.What will be the expected proportions of phenotypes in thechildren of the following parents?a. BBMM * BbMmb. BbMm * BbMmc. BbMm * bbmm

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Q: a Punnett square s

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