Meiosis is a special type of cell division that cuts the chromosome number by half
He is most likely studying for pharmacotherapy since it is the study of medical treatment by means of drugs.
Pharmacokinetics studies hows the drugs move throughout the body. Both pharmacogenetics and pharacogenomics include the study of a person's genes.
Because if they have sexual intercourse with a condom the egg inside you won’t get fertilized and become your period if they have sexual inter course without a condom the egg will be put together with the spent and fertilize the egg and become a baby