In this chapter, we focused on linkage, chromosomal mapping, and many associated phenomena. In the process, we found many opportunities to consider the methods and reasoning by which much of this information was acquired. From the explanations given in the chapter, what answers would you propose to the following fundamental questions? How do we know that crossing over results from a physical exchange between chromatids?

Video transcript

everyone. Let's take a look at this question together. The exchange of segments between non sister chroma tides of homologous chromosomes is termed what? So here we have to Amal agus chromosomes. And so we're talking about those non sister chroma tides which are these two because we know that those from the same our sister chroma tides and this is non sister. And so when we say the exchange of segments, we're talking about the event that leads to having these recombination chromatic. It's where we have those newly wheels on those already existing chromosomes. And so the event that takes place to lead to those recumbent chroma tides where that exchange of segments happens is called the crossing over event which is answer choice C. The correct answer because crossing over takes place when you have those two homologous chromosomes and the genetic information crosses over and you end up with those recombinant chroma tides. Thus making answer choice C. The correct answer as well as answer choice A being incorrect is gene linkage just refers to genes linked on a chromosome answer choice B is the bearing of moloch Ghous chromosomes. And then lastly answer choice D. Is the separation of mal agus paris. So answer choice C. Is the only one here that refers to that exchange of segments between the nonsense or chroma types of homologous chromosomes. I hope you found this video to be helpful. Thank you and goodbye