X for X-Chromosome


Well, I was frustrated looking out for X words to write this post when I struck gold!

X chromosome-a sex chromosome, two of which are normally present in female cells (designated XX) and only one in male cells (designated XY).

The basics-Men inherit the X chromosome they have from their mother and the Y chromosome from their father, while women inherit one X chromosome from the mother and the other from the father.

X inactivation-Every woman carries a double dose of the X chromosome, whereas men carry one X and a Y. Women don’t express both copies of the X chromosome in their cells: in each cell they shut one copy down (the ‘inactive’ X) and use the other.

Specifically, there is a gene on the Y chromosome called SRY that makes the big difference. This gene tells a baby to be a boy. Without the SRY gene, babies develop into girls!

But also know that the SRY gene isn’t enough.  There are lots of genes needed to make a boy. The SRY gene just starts something called a gene cascade which in another words, an avalanche to begin the entire process of making a baby boy. The SRY gene turns on some boy making genes that turn on some more boy making genes and so on. Eventually you get a whole different set of genes working differently than they would without the SRY gene there.

Conclusion is that in all the babies are programmed to be female babies and this gene (SRY) on Y chromosome initiates the whole process of turning the baby into a male baby.

So much so for biology….

Well…now I know there’s a lot of hard work that goes behind in the background!!

And thats precisely why they say, “Mubarak ho…ladka hua hai!! ”

Riaan @20 days

Riaan @20 days


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