A True breeding Wild type fly was crossed with a True breeding Mutant fly to produce a Heterozygous F1. An F1 female was then crossed to a Test male. The results of this cross are as follows: cn vg 4202; cn 458; rd 4258; rd vg 482; cn rd 28; Wild Type 276; vg 32; cn rd vg 264. Which Phenotypes represent the Parentals i. e., the non- Cross Over Phenotypes from the F1 generation

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.

im not intirely sure but i think the anwser is d relative humidity