 Hello, cute hearts. We're back. We're going to talk about meiosis. Now, look into my eyes. If you cannot draw a picture of a cell going through mitosis right now, fully out of your brain labeling all the parts and labeling all the important anatomical structures of these stages, if you can't do that, get out of here. Go study mitosis and don't come back until you can do that. You're back. You totally can draw a picture of mitosis. And that means that we can start looking at meiosis. This entire lecture is going to draw on your understanding of mitosis in order to make meiosis easy. We're going to remind ourselves of the big picture. Why did we do this? Why are we doing this? Remember that we started out with a zygote that was diploid. It had two copies of every chromosome. And then through the process of mitosis, we divided the number of cells. We divided our cells in order to multiply the number of cells. Oh, that was weird. And end up with a grown-up human with what trillions of cells that are all identical genetically. Every single one of your cells has the same DNA in it, which is so crazy except for sperm and eggs. Sperm and eggs are another whole ball of wax. Those are our gametes. And in order to produce gametes, we need a different tool. We need a different strategy. Mitosis will not work. If we made gametes, if you made sperm and eggs with mitosis, you would end up with babies that have too much DNA. And then when they had babies, their babies would have way too much DNA. And then when they had babies, their babies would have like way, way too much DNA. And they'd be super heavy with all this DNA that they don't need. That actually wouldn't happen. They'd all be dead because you can't have too much DNA. You're going to be game over if you do. Right. So we need a process. That process is mitosis to make our gametes. And we're going to start out with an overview of mitosis. So again, we can see like how are we actually going to do this? And then we're going to go into our specific stages.