Discuss the concepts of homologous chromosomes, diploidy, and haploidy. What characteristics do two homologous chromosomes share?

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Hi everyone welcome back, let's look at our next question. It says which of the following statements accurately explains the distinctions between homologous chromosomes and sister chroma tits. So let's just take a moment to briefly recall from our content video what these two things are homologous chromosomes are. When you have a pair of matching chromosomes, they have the same genes in the same locations as each other. But you have one from each parent. So I drew them in different colors. One would be a maternal chromosome and one a paternal. So they may have the same genes but they might have different values of those genes since they're from different parents, they exist in pairs but they're not physically joined together. That's as opposed to the sister chroma tides on a chromosome. There's our sister chroma tits. They're produced when the D. N. A. Has condensed into a chromosome and then replicated itself. So they are identical copies produced when the D. N. A. Has replicated and they are joined together physically at the middle by the centrum ear. So with that in mind let's look at our answer choices. Keeping in mind that choice D. Is all of the above. So this possibility all of these are correct explanations. Choice A says homologous chromosomes are composed of either a maternal or paternal chromosome where sister chroma tides are composed of both. Well, this is not our correct answer homologous chromosomes are not composed of either a maternal or paternal chromosome, The homologous chromosomes consist of both. Since they are a pair one from each parent and the sister chroma tides are composed of either a maternal or paternal chromosome. Since they're just copies of each other, they're not composed of both. Since Choice A. Is incorrect, we also know that Choice D. Is not an answer, since not all of these are accurate explanations. So let's move onto Choice B. Choice B says sister chroma tides are joined together by their central here, whereas homologous chromosomes do not stick together and exist in pairs and this will be our answer. This is correct. Sister chroma kids are physically joined together by that sentry, mere homologous chromosomes do not have any physical connection. Um And exist in pairs. Now we move on a choice. See homologous chromosomes are identical copies of each other that are produced during DNA replication. Whereas sister chroma tides contain the same genes. Los I may have different alleles of a particular gene, and this is not our answer because this is reversed. Sister chroma tides are those identical copies of each other produced during replication and the homologous chromosomes contain the same gene lo fi but may have different alleles since they're from different parents. So that's why Choice C. Is not correct. So again, which accurately explains the distinctions between homologous chromosomes and sister chroma tides. Choice be sister chroma tides are joined together by the central here, where homologous chromosomes do not stick together and exist in pairs. See you in the next video

Discuss the concepts of homologous chromosomes, diploidy, and haploidy. What characteristics do two homologous chromosomes share?

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Key Concepts

Homologous Chromosomes

Diploidy

Haploidy