Chromosomes. XX=female XY=male
Chat with our AI personalities
The male
DNA chromosomes
Sex chromosomes determine the sex of the offspring. In humans, females typically have two X chromosomes (XX) and males typically have one X and one Y chromosome (XY). The presence of a Y chromosome usually results in male offspring, while the absence of a Y chromosome usually results in female offspring.
By observing the proportion of affected offspring and whether males or females are more affected.
because the male can either give an X or a Y