What possible conclusions can be drawn from the observations that in male Drosophila, no crossing over occurs, and that during meiosis, synaptonemal complexes are not seen in males but are observed in females where crossing over occurs?

Video transcript

Hello everyone and welcome to today's video. So the process by which sections of homologous chromosomes are physically broken and rejoin is called. Which of the following In answer choice A. We have independent assortment. Remember that? Independent assortment refers to the inheritance of jeans and how the inheritance of different genes in our bodies are going to be independent from one another. This is not what the question is asking for. So we're going to cancel it out. Then we have segregation. Well, remember that segregation is going to refer to the inheritance of a leo's. And what is going to happen here is that each individual is going to have a certain number of a leo's and they're going to segregate in a way that each gamete is going to have one copy of the A leo. This is not what the question is asking for either. So we're going to cancel it out. Then we have DNA synthesis and synthesis refers to creation. So this is simply the creation of Neo D. N. A. By breaking and rejoining chromosomes. We're not creating new D. N. A. So we're going to cancel it. And then we have frozen over. And remember that crossing over is a process that occurs during my aosis where we have the exchange of DNA between homologous chromosomes. And this exchange is going to take place by physically breaking sections of the chromosomes and exchanging them from one another where they are then rejoined. So this process is explaining crossing over and we're going to highlight answer choice E as a final answer to our question. I really hope this helped you and I have to see you on the next one.