Which of the following statements is false? A) A single gene can only influence a single trait.
B) The number of chromosomes is different in different organisms.
C) There are more genes in a cell than there are chromosomes.
D) The karyotypes for a male human and a female human look different.

A) A single gene can only influence a single trait

Explanation:

One gene has the possibility of influencing many traits and in the same manner, multiple genes can affect a single trait.

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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.