The Y
In all sex chromosomes are some genes in our pseudoautosomal parts,
Essential for development that’s normal from the start.
Sex chromosomes are found in pairs, one in every cell.
Some have XX and some XY but how on earth do you tell?
Well, only men can have the Y. It’s what makes them a man
And helps with male fertility as only a Y can.
Fifty-nine million building blocks of DNA base pairs
Are found in one Y chromosome. I hear you say ‘who cares?’
Well…
That’s two percent of total DNA you find in cells
And each Y contains some fifty genes to make proteins as well.
There is an SRY gene that has a special job
Determining a foetus is not Betty only Bob.
Below you’ll see geneticists use this diagram.
It shows a chromosome’s relative size. It’s called an idiogram.
The Y is stained with chemicals and a microscope is used
To view the bands of light and dark (in this case pink and blue).
These bands are little markers to show where all the genes
On each and every chromosome, can easily be seen.
So, when he’s talking gibberish, you’re thinking ‘who IS this guy?’
Take time out, remember the genes and ask the reason Y.
JAM 23/05/2018
About the Creator
Julie Murrow
I'm an avid reader, writer and pianist. I have written on a variety of subjects and in various genres from children's stories, poetry and history to adult short stories. My three Skinny Pigs and I live by the sea, where I grew up.
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