The correct answer is A) bb
Explanation:
In genetics, an allele is a variation of a gene, which often determines a physical trait. Alleles are classified as dominant if they express even when there are other alleles or as recessive if two copies of the same allele are needed for the gene to express. Moreover, in genetics dominant alleles are represented by uppercase letters while recessive alleles are represented by lowercase letters.
In this context, the allele that is responsible for the brown coat in rabbits is a recessive allele, considering this is represented by lowercase b. This means two copies of the allele are necessary for the rabbit to have a brown coat and therefore the genotype of a brown coat is bb. Also, others such as Bb and BB have the dominant allele related to the black coat, and therefore will lead to rabbits with a black coat.
Answer:
Most cell development and differentiation occur prior to a baby's birth, and baby stem cells, cells that can become different types of tissue, are essentially the same as adult stem cells.
The answer is C. The dark moths were best fit for their environment, since the trees in England were darker due to pollution. The dark moths could best blend into the trees, so birds couldn’t spot them. The white moth population decreased dramatically because they could not blend in with the trees, so they were spotted easier and were thus more vulnerable to predation. This illustrates Darwin’s concept of survival of the fittest. The organisms best fit for the environment live because they have traits and adaptations that enable them to survive. The organisms that do not have these traits, however, will not survive. Since the fit organisms live, they can reproduce and pass on their fitness to their offspring. That’s what makes a species stronger and less vulnerable in their environment. This leads to evolution.
Answer:
I think it's A but I'm not completely sure