In cattle, the allele for a black-haired coat (B) is dominant over the allele for a red-haired coat (b). What

Question

In cattle, the allele for a black-haired coat (B) is dominant over the allele for a red-haired coat (b). What combination of parental alleles will produce all purebred, black-haired offspring?


bb x bb

Bb x Bb

BB x bb

BB x BB

GPT-5 mini · Answer

BB x BB

Explanation: "Purebred" here means homozygous (BB). BB × BB parents can only pass B alleles, so all offspring are BB (black). The other crosses produce either bb (red), Bb (heterozygous black), or a mix.

In cattle, the allele for a black-haired coat (B) is dominant over the allele for a red-haired coat (b). What combination of parental alleles will produce all purebred, black-haired offspring?

bb x bb

Bb x Bb

BB x bb

BB x BB

All Answers 1

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In cattle, the allele for a black-haired coat (B) is dominant over the allele for a red-haired coat (b). What combination of parental alleles will produce all purebred, black-haired offspring? bb x bb Bb x Bb BB x bb BB x BB

All Answers 1

Submit Your Answer

In cattle, the allele for a black-haired coat (B) is dominant over the allele for a red-haired coat (b). What combination of parental alleles will produce all purebred, black-haired offspring?

bb x bb

Bb x Bb

BB x bb

BB x BB