Question

What chromosomes do females have?

Answer 1

Chromosomes are structures which resemble threads that carry genetic information. They are DNA which are in a tightly packed condition. They are found in the nucleus of the cell. There are $23$ pairs of chromosomes in humans, out of which $22$ pairs are autosomes and one pair is allosome.

Complete answer:
Chromosomes are of two types in humans: autosomes and allosomes. Autosomes are chromosomes that are responsible for physical characters. Allosomes are responsible to determine the sex in an individual. In human beings, $22$ pairs of chromosomes are the same for both male and females. It means the autosomes responsible for bodily characters are the same for both sexes.
The sex chromosome is different in male and female. In female, the last pair of chromosome, the allosome, which is also known as sex chromosome is XX. It means a female has two copies of the chromosome X. The presence of this XX chromosome determines an individual as a female.

Additional information:
In human beings, the sex of a child is determined by the father and not by the mother. Female has two copies of X chromosome and male has one X and one Y chromosome, the egg of the female is fertilized by sperm containing either X or Y chromosome. The resultant combination of either XX or XY determines the sex of the offspring.

Note:
Chromosomes play an important role in sex determination in human beings. Only one pair of autosomes is different in male and female. All the other $22$ pairs of autosomes are the same in both sexes. Any aberrations in the sex chromosomes can causes various syndromes such as Down syndrome, turner syndrome, Klinefelter syndrome etc.