12. How many tetrads are visible in a cell during
pachytene stage of reduction division if there are 20
chromosomes in a meiocyte?
Answers
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I think there will be 10 tetrads in pachytene stage.
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10 tetrads are visible in a cell during pachytene stage of reduction division if there are 20 chromosomes in a meiocyte.
Explanation:
- In the Prophase of the reductional division in meiosis, the stage can be for the divided into five division. These are leptotene, zygotene, packytene, diplotene and diakinesis.
- In the pachytene stage of the prophase of reductional division there is crossing over between the adjacent chromosomes.
- This helps in the genetic transfer of material from one chromosome to the other.
- As a result their 10 tetrads are seen if there are 20 chromosome in the meiocyte.
- This is because two chromosomes fuse together during crossing over to form 1.
Learn more about chromosomes
Sex determination is based on particular chromosomes in both birds and humans. State two points of difference between their mechanisms of sex determination.
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