The accompanying chromosome diagram represents a eukaryo...

Question

The accompanying chromosome diagram represents a eukaryotic chromosome prepared with Giemsa stain. Indicate the heterochromatic and euchromatic regions of the chromosome, and label the chromosome's centromeric and telomeric regions.

What term best describes the shape of this chromosome? <>

Accepted Answer

Hi, everyone. Let's look at our next question. An illustration of a human chromosomal diagram is shown below. We have a picture of a V shaped chromosome, single chromatid and the two tips of the V are a separate color labeled with X and the base of the V. The circle is labeled Y. Which of the following choices most aptly describes the labeled parts choice A X equals centromere, Y equals telomeres. B X equals telomeres, Y equals centromere C X equals satellite DNA, Y equals telomeres and D X equals telomeres, Y equals satellite DNA. Well, this central part of the chromosome should help us remember that this part Y is a centromere that central point where the spindle fibers attached to pull the chromosomes apart. That is why our chromatid here is in a V shape because it's at that stage of being pulled apart and then the very tips, the very ends here are telomeres. Those are those very repetitive portions of DNA at the ends of chromosomes. They help protect the chromosomes from degradation each time A chromosome is replicated, it loses a little bit off the end. So these telomeres leave kind of some wiggle room to help with the effects of aging as you have repeated cycles of DNA replication. So let's look at our answer choices. We see that C and D we can eliminate right away because they have one of the things labeled as satellite DNA. And neither of these things are satellite DNA. Satellite DNA are types of noncoding DNA that consist of short randomly repeated sequences. They're often found near the centromere. But those are telomeres and centromere. Satellite DNA are not labeled on the diagram. So we need to have X labeled as the telomeres and Y labeled as the centromere. So that would be choice B choice A has them reversed. So that's not correct. So again, which most aptly describes the labeled parts and that would be choice B X equals telomeres, Y equals centromere. See you in the next video.

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The accompanying chromosome diagram represents a eukaryotic chromosome prepared with Giemsa stain. Indicate the heterochromatic and euchromatic regions of the chromosome, and label the chromosome's centromeric and telomeric regions.

What term best describes the shape of this chromosome? <>

My Courses

Chemistry

Biology

Math

Physics

Business

Social Sciences

Programming

Product & Marketing

The accompanying chromosome diagram represents a eukaryotic chromosome prepared with Giemsa stain. Indicate the heterochromatic and euchromatic regions of the chromosome, and label the chromosome's centromeric and telomeric regions.What term best describes the shape of this chromosome? <>

The accompanying chromosome diagram represents a eukaryotic chromosome prepared with Giemsa stain. Indicate the heterochromatic and euchromatic regions of the chromosome, and label the chromosome's centromeric and telomeric regions.

What term best describes the shape of this chromosome? <>