US /ˈkroʊməsoʊm/
・UK /ˈkrəʊməsəʊm/
So I have one chromosome from my dad.
So it's already replicated, but we only consider it one chromosome.
At conception, a sperm carrying either an X or Y chromosome fuses with an egg which carries an X chromosome.
At conception, a sperm carrying either an X or Y chromosome fuses with an egg which carries an X chromosome.
In most people biological sex is straightforward. 2x chromosomes mean that you are female and xy chromosome means that you are male but nature isn't always that simple.
In most people, biological sex is straightforward: two X chromosomes mean that you are female, an XY chromosome means that you are male.
Each one on a different chromosome.
They're actually arranged like chapters in a book, each one on a different chromosome.
We all have two copies of every chromosome, one copy from the egg, and one from the sperm.
We all have two copies of every chromosome, one copy from the egg, and one from the sperm.
of view, is a single strand of DNA. This huge package of DNA is called a chromosome, and
This huge package of DNA is called a chromosome.
They call him the Y chromosome Adam, apparently a fairly potent guy.
they call him the 'Y chromosome Adam'
Pick up a Y chromosome while you were there?
Leonard: "Pick up a Y-chromosome while you were there? You might be short one."
When conceived, you receive an X chromosome from your mom,
When conceived, you receive an X chromosome from your mom, but depending on which of your dad's sperm fused with the egg, you either get another X chromosome or a Y chromosome.
those chromosomes undergo what's called crossing over, genes from one chromosome are actually
going to swap position with genes from another chromosome. And so before we get to that we