Question

A homozygous red bull and a heterozygous black cow produce a black calf.

Draw a punnett Square showing how this could have occured.
Your Inswer

Answer 1

A homozygous red bull (RR) and a heterozygous black cow (Bb) can produce a black calf. The Punnett square shows that two of the possible outcomes result in a black calf.

Step-by-step explanation:

In the example given, a homozygous red bull (RR) and a heterozygous black cow (Bb) produce a black calf. To represent this, we can use a Punnett square. The Punnett square will show the possible genotypes and phenotypes of the offspring.

The homozygous red bull has the genotype RR, meaning it only carries the red allele. The heterozygous black cow has the genotype Bb, meaning it carries both the black and red alleles. When mating, the bull can only pass on the red allele (R), and the cow can pass on either the black (B) or the red (R) allele.

The Punnett square would look as follows:

| B | b |
-----------------
B | BB | bB |
-----------------
R | RB | rR |

In this Punnett square, there are 4 possible outcomes. Two of the outcomes (BB and bB) result in a black calf, which is the phenotype represented by the question.

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