The sperm fertilizes the egg.

We had a sperm and an egg.

Let me draw the sperm.

It's like the new sperm donor.

I'll generate a bunch of sperm cells.

So you had the sperm and then you had an egg.

The walls of the egg then become impervious to other sperm so that only one sperm can get in, but that's not the focus of this video.

And this is where the system gets really interesting.

He carried this big leather bag full of sperm probes for all of the animals that he'd worked with, all the different animals.

We'll talk about how that happens when we talk about meiosis or mitosis, that when I generate my sperm cells, sperm cells essentially takes one instead of having 23 pairs of chromosomes in sperm, you only have 23 chromosomes.

Cause ,XYY is not inherited, but usually occurs as a random event during the formation of sperm cells.

As soon as the sperm fertilizes this egg, now, all of a sudden, you have a diploid zygote.

He was maybe producing a lot more sperm that looked like that than was looking like this.

The first sperm that penetrates fully into the egg donates its genetic material (DNA).

Because you messed with 300 millions of spermatozoa which were guarded in the seminal vesicle of your father when your mom and dad were doing their business, you were in the seminal vesicle saying

Men, through their penis, they fertilize the eggs by the sperm coming out.

If the queen uses the stored sperm to fertilize an egg, then that egg will grow up to become female.

A person or persons that have the necessary components to reproduce, but may have a low sperm count or problems with ovulation could look into options such as artificial insemination or intracytoplasmic sperm injection(ICIS).

The females store the sperm they obtain during their nuptial flight to selectively fertilise future eggs.

Now, theoretically, they are able to make sperm and egg cells with old skin cells.

They get paid by pollen and nectar, to move that male sperm, the pollen, from flower to flower.

Your Honor, the entire report was offered as evidence... and the report contains this information about spermatogenesis.

And I said, Well, Men, through their penis, they fertilize the eggs by the sperm coming out.

And they will live for 15 or 20 years, continuing to lay eggs using the sperm from that original mating.

One moonlit night before a storm, thousands of urchins, clams and corals released trillions of sperm and eggs into the open sea.

And yet, I read in your report here, that you checked... to determine whether spermatogenesis was occurring... in the body of the deceased at the time of death.

And if we add the chances that from all the times when your father had some fling, just imagine all the other chances you had had of being born.

And each sperm cell will have one from each of these pairs, one version from each of those pairs.

It is a matter of great astonishment that the consideration of the habits of so interesting, and, in a commercial point of view, so important an animal (as the Sperm

You can see the fish are balled up and then there's a little cloudy area there where they're exchanging the eggs and sperm for reproduction events that the ocean is supposed to do, but struggles to do in many places now because of human activity.

It's all determined by whether let me just draw a bunch of dad's got a lot of sperm, and they're all racing towards the egg.

Intracytoplasmic sperm injection is a more recent technique that involves injecting a single sperm directly into an egg, the egg is then placed in the uterus by in vitro fertilization.

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.

Early in embryonic development in females, one of the two X chromosomes is randomly and permanently inactivated in nearly all somatic cells (cells other than egg and sperm cells).

You say, 'What pointer do I want to start my team with?'

Spermatogenesis was occurring at the time of death.

It's not just my work in amphibians, but similar work has been shown in fish in Europe, holes in the testes and absence of sperm in reptiles in a group from South America and in rats, an absence of sperm in the testicular tubules as well.

They actually perform a surgery, take them out of the ovaries of the mother, and then they fertilize them with semen, either it might come from the father or a sperm donor, so then all of these becomes zygotes once they're fertilized with semen.

Normally a gamete (sperm or egg) carries a full set of chromosomes that includes a single copy of each chromosome, as aneuploidy generally leads to severe genetic disease in the offspring.

As in solutional caves, small speleothems may develop in sea caves.

And of course, we don't do these experiments in humans, but just by coincidence, my colleague has shown that men who have low sperm count, low semen quality have significantly more atrazine in their urine.

But it makes perfect sense once you know the real motives of the powers that be.

The spirit was epitomized by a single wall in our small two bedroom apartment on the South of Chicago

And those act on the gonads, so in the male on the testis, and in the female on the ovaries, to stimulate development of sperm in the male, and oocytes (eggs) in the female, and also the production of gonadosteroids, predominantly testosterone in the male, and estradiol in the female.

At 672 metres above sea level, it is one of the most prominent of the hills which form an amphitheatre around the city.