So in a male, you have some germ cells, so some of these cells turn into germ cells.

It's going to be very challenging to deal with.

And these germ cells, they're the product of mitosis.

And the germ cells exist as part of your reproductive organs.

And it's not just kids, it's adults too.

It'll just be a random mutation.

Nassau groupers in Belize in the Mesoamerican Reef.

No males at all.

The traits that will be passed on or the changes that will be passed on are those that occur in the germ cells.

I know what's on your mind when you're looking at these pictures.

If I talked about other species, they might have 10 chromosomes or they might have 5 chromosomes.

Embryonic charter, livestock and wildlife repopulation.

The penis is one of the male reproductive organs.

And moreover, it has to work.

Usually through the reproductive organs.

And very importantly, with the introduction of sexual reproduction that passes on the genome, the rest of the body becomes expendable.

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

It's not just any cell in the body.

It's not virginity it's fecundity.

Tropical rainforests arose, sparking new layers of interdependence.

Now, in order to do this, we need the right kind of language.

I have come to think it's one of the most powerful brain systems on Earth for both great joy and great sorrow.

Alright, we're beginning our unit on genetics and reproduction.

(Laughter) Right?

So let's say those are the germ cells.

And with that... my reproductive and sexual function.

Over time this produced every one of the billions of species of life on earth.

Even to this day, it is thought by physicians and most scientists around the world, that the function of the Y chromosome is restricted to the cells of the reproductive tract.

You can have culture without exchange.

Does this matter?

So it could go into a germ cell.

Fertility

They laughed more than you guys are. (Laughter)

The men and women are different.

the process of creative destruction.

In a healthy worm bin habitat, worm reproduction will occur when the wigglers become sexually mature, indicated by an elongation of the segments into a bulbous structure.

Because, for example, the genes don't care whether we're happy, they care that we replicate, that we pass our genes on.

Now, I want you to just look really close up onto what's happened there.

It's a germ cell.

How does evolution do cumulative, combinatorial things?

That is to say, they specialize with respect to reproduction.

Audience Member Her uterus would be torn. Christopher McDougall

(Laughter)

Clevon should regain full reproductive function.

One point three million eggs per square meter inside the marine reserve where these snails are very abundant.