Individuals are Dioecious i.e. include male and female gonads in numerous induviduals.Male Gonads produce sperms and the female gametes produce Ovum. Lower animals ad plants are usually Monoecious.
The chromosomes which help in choice of the sex of the offspring are called the Allosomes or Sex Chromosomes. Whereas the vegtative chromosomes which are not useful in sex are called the Autosomes.
The method of sex choice in Human Beings is XY type, where in males, the Allosomes are XY type and in females the allosomes are XX
type. Individuals consist of 46 chromosomes in the nucleus of the cell out of which, 44 are autosomes and other 2 are allosomes.
On production of gametes, the no. of chromosomes is decreased to half, i.e. in the gametes there are 23 chromosomes. The kind of chromosomes is not extremely exact same.
In ladies, ova consists of 22 autosomes and 1 X chromosome.
In males, the sperm includes 22 autosomes as in ovum nevertheless the allosome can be either X or Y type, i.e. a sperm can consist of either X or Y alloome.
Throughout fertilisation, if sperm with X allosome merges with the ovum, then it results into advancement of female offspring (XX) and if Y allosome of male merges with the ovum, then it results to the advancement of Male offspring (XY).
Ovum has no function in sex choice nevertheless the sperm has the function of sex choice in individuals, i.e. if sperm has X allosome, offspring is female and if Y allosome exists, offspring if male.
On production of gametes, the no. The kind of chromosomes is not precise very same.
On production of gametes, the no. The type of chromosomes is not extremely exact same.