Question

Don't know much about meiosis so please help me with these questions:
1. Using Models ) What is the the result of the first meiotic division (meiosis I)

2. Using Models ) What is the result of the second meiotic division (meiosis II)

3. Drawing Conclusion ) How does meiosis lead to increase genetic variation ?


4. Predicting ) How would the gametes be affected if a pair of chromatids failed to separate in the second meiotic division?

Answer 1

It is the reduction division, so it reduces the number of chromosomes in half, making the daughter cells haploid (when the parent cell was diploid).
It is during meiosis I that most of the genetic recombination occurs.

Answer 2

1. After meiosis 1, there would be two daughter cells that are haploid cells.(they both have n chromosomes.)
2. After the Second meiotic division, there would be 4 haploid cells.
3. Genetic recombination leads to an increase in genetic variation by creating exponential different combinations for genes.
4. I don't know about this one. :(

Answer 3

the DNA undergoes replication, just in the begening mitosis started. So, when you first see chromosomes in meiosis I, they have sister chromatids (copies), just like in mitosis. It is just that in meiosis I, we will be talking about tetrads becoming visible, lining up, separating, and decondensing (rather than chromosomes, like in mitosis). Finally, cytokinesis (dont know if i spelled that right)occurs, too, any time after the tetrads have moved out of the equator (just like in mitosis).

Answer 4

4. it would cause mutation because the chromatids failed to separate. And it will exhibit down syndrome

Answer 5

Thanks guys :) ill study more bout meiosis stuff lol

Answer 6

Well,you could watch this movie called "Osmosis Jones",Its not boring trust me..Its basically all you need to know about meiosis.

Answer 7

Hope it helps:))