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Calculating number of chromosomes in Mitosis and Meiosis?
Fill in the table for a diploid organism with 3 different (non-homologous) chromosomes (a small, a medium, and a long chromosome). Assume that you are making the counts after each stage has occurred
Phase
Growth Phase 1
Synthesis
Growth Phase 2
Meiosis 1 – Prophase
Meiosis 1 – Metaphase
Meiosis 1 – Anaphase
Meiosis 1 – Telophase
Meiosis 2 – Prophase
Meiosis 2 – Metaphase
Meiosis 2 – Anaphase
Meiosis 2 – Telophase
With Meiosis I'm not sure because I have an odd number of chromosomes. How do I do this? Can someone help me please? How many chromosomes are in each phase, its weird because we're starting with 3 chromosomes.
2 Answers
- Anonymous1 decade agoFavorite Answer
Well, I think you have a misconception of chromosomes a lot of people have (including me a couple of months ago). A chromosome before synthesis of DNA happens is actually two chromatids not bound by a centromere. We have one chromatid from each parent, giving two chromatids, but they don't bond together through the centromere, as seen in this picture:
http://www.bio.georgiasouthern.edu/bio-home/harvey...
The first image represents the chromosome before synthesis, the white chromatid is the dad, and the blue is the mother.
Now imagine synthesis just happened, and check the second image. You have two white chromatids, and two blue chromatids. It doesn't show in the picture, but each white and each blue chromatids are bonded by the centromere normally.
So as you can see, it doesn't matter if the chromosome number is an odd or even number. If you have three chromosomes at the start, after synthesis you will have six! Six chromatids from the dad and six from the mother, for a total of twelve chromatids.
- stacksLv 44 years ago
Mitosis is what maximum cells do to divide themselves into 2 same cells. Meiosis is barely what intercourse cells do to divide chromosomes to make 2 diverse cells. 4) no longer each cellular will teach the errors in view that all cells are incredibly expert to a minimum of one specific area of the physique. occasion: If the lost chromosome impacts eye shade, it incredibly is going to possibly no longer impact the cells that make up your liver.