How Sex Is Determined In Human ?
⇨ Sex of a baby is determined by the presence of type of sex chromosomes in
the baby or new born.
⇨ The process of determining the types of sex chromosomes present in a baby
is known as Amniocentesis, As Amniotic fluid is used for the determination
of presence of sex chromosomes.
⇨ In human beings there are 23 pairs of total chromosomes. There are two
sets of chromosomes present inside the nucleus of human cell.
1. Autosomal Chromosomes
2. Sex Chromosomes
⇨ Autosomal Chromosomes are responsible for characters other than
sexual characters like body color, height, facial characters etc.
⇨ Where as sex chromosomes are responsible for the sexual characters or
sexual orientation of the baby like short or long hairs, male or female
characters etc.
⇨ Sex chromosomes are of two types in human:
1. XX- In female
2. XY- In Male
⇨ During the process of reproduction both male and female forms their
gametes for fertilization. Male gametes is called Sperm which carries either
chromosome X or Y along with other autosomal Chromosomes.
⇨ In other hand female form ovum or ovary as gamete which carries only X
type chromosome along with other autosomal Chromosomes.
⇨ When it comes to fertilization there is 50-50 chance for the formation of
male or female baby.
⇨ Here is all possible mating or fertilization of gametes which takes place
inside the fallopian tube of female:
Male x Female
Gametes: (X , Y) (X , X)
Fertilization: XX, XX, XY, XY
Babies: 2 Female (XX),2 Male (XY)
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