How do genetic diseases in offspring, that were not present in parents, occur A.)They occur by chance in one or a few egg or sperm cells, or right after fertilization

B.)They occur from lack of nutrients to the offspring

C.)Mutations only occur if the mother and father pass them on.

idk

explanation:

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.