Cytogenetics is a sub-field of genetics dealing with the behavior of cells based on their chromosomes.
Description
A sex-determination system is a biological system that determines the development of sexual characteristics in an organism. It occursin three different stages or types. All 3 of them happen before the fetus is born.
Types of sex determination
There are three types of sex determination:
- Chromosomal or Genetic sex
- Gonadal sex
- Phenotypic sex
Chromosomal sex
Determined at fertilization and depends on which sperm fertilized the egg. Under normal circumstances, the chromosomal sex can be XX for females or XY for males.