describe the sex determination in human beings?
Answers
Sex determination. Most mammals, including humans, have an XY sex-determination system: the Y chromosome carries factors responsible for triggering male development. The "default sex," in the absence of a Y chromosome, is female-like.
DETERMINATION OF SEX IN HUMAN BEINGS
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we (human beings contain 23 pairs of chromosomes (46 chromosomes) totally in us. out of this the last 23 rd pair is different in both male and female and the remaining 22 pairs are similar in both of us.
the remaining 22 pairs are called autosomes and the last pair which is different in both male and female is called sex cells.
the last 23rd pair in male has XX chromosome.
whereas in female it is of XY chromosome.
our sex determined when the sperm fertilises with the ovum.
when our sperm containing XY fertilises with the ovum containing XX we get a boy or a girl child
when X chromosome fertlises with the Y chromosome we get a boy child.
when x chromosome fertlises with another x chromosome we get a girl child.
THUS IT IS OUR FATHER WHO IS RESPONSIBLE FOR DETERMINING THE CHILD WHETHER BOY OR GIRL.
HOPE IT UNDERSTOOD FOR U ...... HERE IS A PICTURE ABOUT IT.....
