I believe the correct response would be D. A polygenic trait encodes for something as melanin concentration in one's skin, skin colour, height etc. These vary quite immensely from person to person, for instance, and can not only be stated as discrete categories in terms of phenotype, as short and or tall. Since the many phenotypes are based on the appropriate Genotypes, there must be many possible Genotypes as well to code and or provide for these diverse phenotypes within a given polygenic trait.
I think it is organic compounds
Answer:
Sickle cell disease is due to a type of substitution mutation.
Explanation:
Sickle cell disease is a condition that is transmitted from parents to children in an autosomal recessive inheritance pattern. It is due to a mutation that is capable of altering the shape of the erythrocyte, as well as its ability to circulate and carry oxygen.
The mutation that occurs in sickle cell disease is due to an alteration in the β-chain of hemoglobin, caused by the substitution of thymine base by adenine in the DNA that determines it. As a result, valine replaces glutamic acid in the β-chain amino acid sequence, with the consequences described.
- <em>The other options are not correct because </em><u><em>deletion, duplication and translocation </em></u><em>correspond to chromosomal mutations, not responsible for sickle cell disease.</em>
Most coelomates possess a "A. Circulatory system" because the main feature of these animals is that they posses a digestive tract, which requires a certain amount of circulation.
Barnacles belong to phylum Crustacea.