Albinism in humans occurs when both alleles at a locus produce defective enzymes in the biochemical pathway leading to melanin. Given that heterozygotes are normally pigmented, which of the following statements is/are correct?
a. One normal allele produces as much melanin as two normal alleles.
b. Each defective allele produces a little bit of melanin.
c. Two normal alleles are needed for normal melanin production.
d. The two alleles are codominant.
e. The amount of sunlight will not affect skin color of heterozygotes.

A one normal allele produces as much melanin as two normal alleles

Number one is sinkholes may form from water erosion

answer: - b cells

explanation: -

there are many types of white blood cells present in our body. one such class of white blood cells are the lymphocytes. the b cells belong to the lymphocyte class of wbcs. the b cells perform their action against the pathogen by producing specialised proteins called as antibodies. these antibodies are produced as and when the b cells encounter pathogens in response to the antigens present on the surface of the pathogen. these antibodies bind to the antigens present on the pathogen and then, target them for destruction by other cells of the immune system.

so, the b cells mediate their action by identifying the antigens present on the surface of the pathogens and then producing antibodies in return to mediate its effect.