Determination of sex....

This post deals with an interesting topic which is the Determination of sex ...

    I'm very curious to know about it.... Do you. ..?
 Here we go...

   A person's sex is determined by two chromosomes  called X and Y...  Females have only two X chromosomes  while males have X and Y chromosomes  .

       The Y chromosome is much smaller than the X chromosomes and contains fewer genes less than 100 compared to the 2000 genes on the X chromosome.

       A mother's egg cell always  carry X chromosome since they have only X chromosome , where as a father's  sperm can carry either an X or Y chromosomes.

     Determining gender :
                                  As mother always passes X chromosome to her children . It's the father's sperm that determines the sex of a baby.

         If  a sperm carries  an X- chromosome , the baby will be a girl . If it carries a               Y - chromosome , the baby will be a boy .


                       .....Thank you......