In Angus cattle, the fur color black (B) is dominant to the color red (b). If we cross a homozygous dominant bull with a homozygous recessive cow is it possible for the offspring to be red?
I think you are crossing
BB with bb each time you will get Bb and since b is recessive, you cannot get a red cow.
There is a 25% of the offspring being red because...
BB Bb Bb bb
To determine the possible fur color of the offspring, we need to understand the principles of inheritance and use a Punnett square. In Angus cattle, the fur color black (B) is dominant to the color red (b).
A homozygous dominant bull would have the genotype BB, meaning that both of its alleles are black. A homozygous recessive cow, on the other hand, would have the genotype bb, meaning that both of its alleles are red.
To determine the possible offspring, let's create a Punnett square:
| B | B |
---------------------------
b | Bb | Bb |
---------------------------
b | Bb | Bb |
As we can see from the Punnett square, all the possible offspring would have the genotype Bb. Therefore, it is not possible for the offspring to be red, as they would all have at least one dominant black allele (B).