a

Sex Determination: Who is responsible for the gender of a new born baby?

every organism is made from cells cells

contain thread like structure known as

chromosomes in humans there are 46

chromosomes in each cell and these

chromosomes are found in pairs so there

are 23 pairs in male and female all the

pairs of chromosomes are same except one

pair chromosomes in this pair are called

sex chromosomes sex chromosomes can be

of two types namely x and y in a male

cell both x and y chromosomes are

present but in female cells two x

chromosomes are present

we know that male reproductive cells are

known as sperm and female reproductive

cells are known as eggs reproductive

cells are different from normal cells as

they contain only 23 chromosomes one

from each pair

when sperm cell and egg are combined

together they form a cell which has 46

chromosomes or 23 pairs this new cell

formed is called zygote and develops

into baby

since reproductive cells have only 23

chromosomes sperm cell can contain

either X or Y chromosome and an egg cell

will always have X chromosome during

reproduction lot of sperm cells are

released and only one sperm fertilizes

the egg

when sperm containing y-chromosome

fertilizes the egg resultant cell will

have a sex chromosome containing x and y

chromosomes and the zygote will grow

into a boy

but when the sperm cell containing X

chromosome fertilizes the egg resultant

cell will have a pair of X chromosomes

and the zygote will grow into a girl

it is clear that a child will be a boy

or girl depends on male and not the

female