Question

Which of the following is an example of Mendel’s Law of Dominance? * 1 point A dog breeder breeds a brown dog and a black dog and all the puppies are brown. A farmer mates a white cow with a red bull and the offspring is red and white. A stray black male cat mates with an orange female cat and all of their male offspring are orange and their female cats are orange and black. A plant biologist crosses red flowers with white flowers and all the offspring are pink.

Answer 1

Answer:

A dog breeder breeds a brown dog and a black dog and all the puppies are brown.

Explanation:

According to Mendel’s Law of Dominance, when two homozygous parents that have contrasting traits are crossed, the dominant trait is what would be expressed in the next generation as phenotype. The offspring produced by these parents are heterozygotes having two different alleles of a trait that are contrasting. One allele will be dominant over the other. The allele that is not expressed is the recessive allele of the trait, while the allele that is expressed is the dominant allele.

A good example of Mendel’s law of Dominance is the case of a dog breeder who breeds a brown dog and a black dog and all the puppies are brown.  

We can infer that both parents are likely homozygous to hair/skin color as a trait. And when crossed, all offspring are brown simply because the allele for brown color is dominant over the allele for black color, and since the offspring are heterozygotes, i.e., they have a pair of dominant allele and recessive allele, the dominant allele would be expressed over the recessive allele. Black color is concealed in the presence of brown color.

Answer 2

Answer:

A dog breeder breeds a brown dog and a black dog and all the puppies are brown.

Explanation:

This is because of the Mendelian inheritance order of characteristics. In all other example, there are several other things that don't align with this order like gender variability, specie variability etc.

All the puppies are brown and this shows proper and complete dominance in accordance with the law...