Okay, We're going to look at a couple of different terms here, and the first one is going to be crossing over. So what happens in a crossover event is, um we have thes two chromosomes here, and when crossover happens, you can see the crossover event happening right here in the middle, and that results in thes chromosomes. And they have segments from each of the chromosomes. So here we have the red one that has a segment of the blue. And here we have the blue chromosome that has a segment of the red. And a delusion is when a chromosome here indicated by this pink one Here, um, let's say this gene has four genes, So 1234 we labeled it. And in a deletion, um, when it replicates what normally, when it would normally replicate to itself to have it. 1234 again, it actually deletes one of the genes. And so it ends up just being 1 to 4 in non disjunction things has to do with again replication. So here we can see. Um, this is Metta phase one, and these chromosomes are lining up and they're getting ready to divide and weaken See here in and a phase that they're dividing. But we can see that they divided unequally. So here we have three chromosomes, and here we only have one. And so when it goes to replicate again in meta phase two, um, that ends up with these three replicating here and this one on Lee having one chromosome to replicate here and this result in, um, an an employee where this one, uh, thes two have n plus one because they have extra chromosomes. And this one has an minus one and being the normal amount of chromosomes. Now, the next term is transportation and translocation is when we have two genes as seen here, and I labeled them just generically 1234 And then on the other chromosome 5678 And when translocation happens, we can see what this ends up being. The order will be change, so it will actually be 1278 And then, uh, the other chromosome, the green one will have 56 It's normal chromosome, but then it will have 34 from the other chromosome and Correa typing. This is, uh, a way that we can kind of sort the chromosomes. So when the chromosomes are lined up in meta phase, as we saw on this figure up here, um, they are very condensed and easily to identify. So carry a typing. What it does is identify these chromosomes and sort them by their defining feature. And then the last term is linkage group. So what a linkage group is is to find as being all the genes on the same chromosome. So if we look at this chromosome here that I've drawn all of these genes, let's just label them generically. 123 456 All these genes here or what we can be, um we can call them that. They're all on the same linkage group.