There are other sex chromosome pairings like

Chromosome one top left, bottom right are the sex chromosomes.

So let's say this is your mom's genotype for her sex determining chromosome.

Y is the sex determining chromosome in many species, since it is the presence or absence of Y that determines male or female sex.

You see, for most mammals, the sex of a baby is determined genetically with the XY chromosome system.

In the absence of the SRY gene from the Y chromosome, the female sex (ovaries instead of testis) will develop.

X chromosome.

Research on autism schizophrenia relations for chromosome 15 (15q13.3), chromosome 16 (16p13.1) and chromosome 17 (17p12) are inconclusive.

Let's say on some chromosome let me pick some chromosome here.

Your mom could give this other X chromosome with that X chromosome.

So this is one chromosome there and this is the other chromosome here.

So let's say that's an X chromosome and this is a Y chromosome.

Chromosome one, top left.

They're both chromosome 3.

Or my mom might give me that chromosome or might give me that chromosome.

And in general for any sex linked trait, if it's recessive, if it's a recessive sex linked trait, which means men, if they have it, they're going to show it, because they don't have another X chromosome to dominate it.

For example, my dad might give me this chromosome or might give me that chromosome.

So let's say we look at chromosome number I'll just call this chromosome number 3.

It's on the X chromosome.

So I have a chromosome.

That's another chromosome right there.

So this guy has pulled one copy of that chromosome and one copy of this chromosome.

The chromosome that was in the cell doesn't have one the chromosome we put in does.

Well, your mom could give this X chromosome, in conjunction with this X chromosome from your dad.

The other is the X chromosome.

The chromosome is literally blown apart.

So this is a single chromosome.

Let's say this is some chromosome.

This is one chromosome right here.

Now, let's call this chromosome 3.

If I get this chromosome from my mom and this chromosome from my dad, what's it going to be?

And in the other case, the sperm is carrying an X chromosome, meeting the X chromosome of the egg.

The new chromosome went into the cell.

And some of them have an X chromosome in them and some of them have a Y chromosome in them.

Committed sex is premeditated sex.

The Y chromosome is metacentric and the X chromosome is variable, ranging from nearly metacentric to acrocentric in five specimens studied.

So maybe for this chromosome I get it from my dad, from the next chromosome, I get it from my mom.

People normally have two copies of this chromosome.

let's say it has this chromosome right here.

Now men, they only have one X chromosome.

And then the other one's a Y chromosome.

If you get an x chromosome from your mom and an x chromosome from your dad, you're going to be a female.

So after meiosis occurs to produce the gametes, the offspring might get this chromosome or a copy of that chromosome for eye color and might get a copy of this chromosome for teeth size or tooth size.

That is, of course, sex. Great sex.

These are normally found only at the ends of a chromosome, but in chromosome 2 there are additional telomere sequences in the middle.