in humans , cystic fibrosis is caused by a recessive allele on chromosome 7. a person must inherit two of these alleles to have the disease. what are the chances of a child having the disease if both of the parents are heterozygous

white blood cells or wbc s are mainly 2 types-

1.agranulocytes

2.granulocytes

the monocytes or macrophages of agranulocytes , dendritic cells which are accessory leucocytes, and b cells which is one type of lymphocytes   identify the antigens present on the pathogen's surface. these three cells are called antigen presenting cells(apc) which are phagocytes and destroy the antigens by secreting antitoxins. besides this leukocyte is always plays vital role in the immunity of the body.

i believe it would cause an increase of percipitation, though i could be wrong. so i would say b is the answer.

the three components of a nucleotide are the nitrogenous base, the phosphate group and the five-carbon sugar.

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