Question

explain how the sex of a child is determined genetically at the time of conception in human beings

Answer 1

Hi Dude


Determination of Sex of a child.

1. A human male contains 23 pairs of chromosome including a pair of sex chromosomes XY.

2. A human female too has 23 pairs of chromosomes along with sex chromosomes XX (22 pair are autosomes).

3. During gamate formation in human male 50 percent of the gamates carry X chromosomes while 50 percent carry Y chromosomes along with autosomes

3. In human female all gamates carry X chromosomes because a human female has XX.


4. When a male sperm carrying X chromosome fuses with female gamate (which always carry X chromosome) it develops in to a female.


5. When a male sperm carrying Y chromosome fertilises egg the individual grows to be a male.


6. Thus genetically father is responsible for the sex of child not the mother but in our society mothers are blamed for this which is not good.





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Answer 2

Answer:

The sex of a baby is determined by its chromosome make-up at conception. An embryo with two X chromosomes will become a girl, while an embryo with an X-Y combination results in a boy