From Conception to Birth Oocyte

I think we have found the problem. Your ovarian follicles are still immature.

Fifty communicable diseases like to travel in human shit.

It's not just any cell in the body.

In the immortal germ line of human beings that is, the eggs that sit in the ovaries they actually sit there in a state of suspended animation for up to 50 years in the life of each woman.

The most exciting thing for Bob Lanza is the ability now to take any kind of cell with induced pluripotent stem cells and turn it into germ cells, like sperm and eggs.

Oeufs. Un oeuf, des oeufs.

And the cells that have a haploid number of chromosomes are our gametes, which are sperm cells for men, and ova, or egg cells for women.

In a female, they would be involved in the ovaries.

In fact, it's one of the biggest problems with chemotherapy today.

What we did is something called somatic cell nuclear transplantation.

The ostrich egg is a single cell, and it can grow up to five pounds.

And the germ cells I'll just write it here, just so you get a clear for a male, that's the sperm cells, and for female that's the egg cells, or the ova.

We took the eggs of a related species, a living frog, and we inactivated the nucleus of the egg.

Now, that first cell that had the potential to become me, it was a product of fertilization, of an egg from my mother so an egg from my mother.

A somatic cell, a body cell, was taken from its body, gestated in the ovum of a cow, and then that cow gave birth to a guar.

Hey, listen. I, I got a big problem. I totally just lied to Pink.

Eggs?

And then we took the dead nucleus from the dead tissue of the extinct frog and we inserted those nuclei into that egg.

So this very first cell that was created from this fertilized egg, this is called a zygote.

So, ant colonies are a good example of an organization like that, and there are many others.

No, strawberries.

Want some eggs?

Uh, the eggs?

An egg!

I smell eggs.

Now, in the case of humans, the diploid number is 46, so N is equal to 23.

Oh. Egg rolls?

Sperm

Or look at it another way Suppose you have a dozen eggs.

It's turning the eggs.

Eggs.

Like a hardboiled egg.

And these buttons there those are chicken eggs.

Seung Jo and Eun Jo's lunches.

More eggs?

Eggies!

Milk and eggs.

Eggs. Powdered, but but I do 'em good.

All the cells of your body your lung cells, your liver cells, your skin cells, all the cells of your body ultimately derived from this one founding cell, the fertilized egg.

And same thing for invertebrates. This is the example.

That's the egg, and we all know how this story goes.

Where are those eggs?

I need six eggs

Can't we see the unfertilized eggs?