From a piece of blank paper, cut out three sets of four cigar-sha...

Question

From a piece of blank paper, cut out three sets of four cigar-shaped structures (a total of 12 structures). These will represent chromatids. Be sure each member of a set of four chromatids has the same length and girth. In set one, label two chromatids 'A' and two chromatids 'a.' Cut each of these chromatids about halfway across near their midpoint and slide the two 'A' chromatids together at the cuts, to form a single set of attached sister chromatids. Do the same for the 'a' chromatids. In the second set of four chromatids, label two 'B' and two 'b.' Cut and slide these together as you did for the first set, joining the 'B' chromatids together and the 'b' chromatids together. Repeat this process for the third set of chromatids, labeling them as 'D' and 'd.' You now have models for three pairs of homologous chromosomes, for a total of six chromosomes.

Separate the chromosomes as though anaphase II and telophase II have taken place.

Accepted Answer

Hi, everybody. Let's look at our next question. It says in the beginning of prop phase two chromosomes condense and become visible under the microscope. They then align themselves at the equatorial plate during the process of meta phase two. This is then followed by the separation of the cysto chromatid and the formation of four haploid cells in the process of anna phase two and tele phase two. During which stage of meiosis two do the chromosomes de condense. We have answer choices of a meta phase two. B, late pro phase two, CAA phase two or D tele phase two. So when I answer meiosis or mitosis questions, I sometimes like to just jot down my stages so I can keep straight the order in which they're happening. And that helps me remember what's going on in each stage. So I have pro phase meta phase anna phase and tele phase. And I, the question helps me along even remembering what happens that in prophase, I've got the chromosomes condensing. And in meta phase, I like to remember that with the letter M meaning middle, I remember that the chromosomes line up in the middle of the cell in anaphase. I remember that with the letter A meaning away, they began to move away from each other towards the poles of the cell. And then in telephones, we have cytokinesis with the formation of the two new cells. And we're asking specifically, when do the chromosomes de condense in this state of affairs? Well, we don't de condense the chromosomes until we're done with the whole process. The chromosomes need to be condensed during the process of meiosis as they're pairing up and separating, so that they remain organized essentially. So that leads us to our last phase tele phase, they won't de condense until this whole process has come to an end. And indeed, um once the cells have begun dividing, you have the nuclear envelope beginning to form and the chromosome is decon. So that leads us to choice d tele phase two as the stage of meiosis two. When the chromosomes de conducts, see you in the next video.

Key Concepts

Chromatids

Homologous Chromosomes

Anaphase II and Telophase II

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