For Problems 25–30, consider a diploid cell that contains three p...

Question

For Problems 25–30, consider a diploid cell that contains three pairs of chromosomes designated AA, BB, and CC. Each pair contains a maternal and a paternal member (e.g., A^m and A^p). Using these designations, demonstrate your understanding of mitosis and meiosis by drawing chromatid combinations as requested. Be sure to indicate when chromatids are paired as a result of replication and/or synapsis. You may wish to use a large piece of brown manila wrapping paper or a cut-up paper grocery bag for this project and to work in partnership with another student. We recommend cooperative learning as an efficacious way to develop the skills you will need for solving the problems presented throughout this text.

Are there any possible combinations present during prophase of meiosis II other than those that you drew in Problem 26? If so, draw them.

Accepted Answer

Hi everyone. Let's look at our next question. It says. How many chromosomes would an organism have in the pro phase of mitosis? If it has 12 chromosomes in the pro phase two of my aosis, Well let's just recall how many chromosomes cells have in these two processes. We recall that mitosis where the cells are making identical copies themselves. Both daughter and parent cells are deployed. But in mitosis the parent cells are deployed but the daughter cells are hap Lloyd. So then we need to look at our mitosis here and figure out what state are the cells in and pro Phase two. So let's recall that after mitosis one the daughter cells are half Lloyd and that's because the homologous pairs have been separated into daughter cells during mitosis. One. So the first pair of daughter cells after mitosis one already are down to a halfway number of chromosomes profits too. Is that first stage of the second part of my Asus. So at that point the cells are hap Lloyd. So we know that the we are looking at the number N chromosomes. So these cells and profiles to our question tells us have 12 chromosomes. We know N equals 12 in the pro phase of mitosis. The cells will be deployed So two N would equal 24. So we look at our answer choices. We no choice. A 12 is incorrect because that's our halfway number But choice B- 24 is the deployed number and then C and D. Are equally incorrect as neither are twice the happily number again, How many chromosomes does an organism have in the pro phase of mitosis? If it has 12 and pro phase two of mitosis, and the answer is B 24. See you in the next video.

Key Concepts

Mitosis

Meiosis

Chromatid Pairing and Synapsis

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