Table of Contents
- 1 What happens in meiosis 1 but not meiosis 2?
- 2 What unique events occur in meiosis 1 that do not occur in mitosis or meiosis 2?
- 3 Which does not occur during meiosis?
- 4 Why meiosis 2 is similar to mitosis?
- 5 Why is meiosis 2 similar to mitosis?
- 6 What is the difference between metaphase 1 and 2 in meiois?
What happens in meiosis 1 but not meiosis 2?
In meiosis I, homologous chromosomes separate, while in meiosis II, sister chromatids separate. Meiosis II produces 4 haploid daughter cells, whereas meiosis I produces 2 diploid daughter cells. Genetic recombination (crossing over) only occurs in meiosis I.
What unique events occur in meiosis 1 that do not occur in mitosis or meiosis 2?
The events that occur in meiosis but not mitosis include homologous chromosomes pairing up, crossing over, and lining up along the metaphase plate in tetrads.
Which is missing during meiosis II?
In some species, cells enter a brief interphase, or interkinesis, before entering meiosis II. Interkinesis lacks an S phase, so chromosomes are not duplicated. During meiosis II, the sister chromatids within the two daughter cells separate, forming four new haploid gametes.
Which does not occur during meiosis?
Explanation: Crossing over is the only answer choice that does not occur during mitosis. Crossing over occurs during prophase I of meiosis and involves swapping of genetic information between homologous chromosomes. This require the formation of tetrads, which does not occur during mitosis.
Why meiosis 2 is similar to mitosis?
Meiosis II resembles mitosis , with one sister chromatid from each chromosome separating to produce two daughter cells. Because Meiosis II, like mitosis, results in the segregation of sister chromatids, Meiosis II is called an equational division.
What are the majors phases of meiosis 1 and 2?
Both stages of meiosis 1 and 2 consist of four phases: prophase, metaphase, anaphase, and telophase . Homologous tetrads are divided into two daughter cells at the meiosis 1. The resulting bivalent chromosomes in one daughter cell are divided into two daughter cells, containing single sister chromatids in each.
Why is meiosis 2 similar to mitosis?
The mechanics of meiosis II is similar to mitosis, except that each dividing cell has only one set of homologous chromosomes . Therefore, each cell has half the number of sister chromatids to separate out as a diploid cell undergoing mitosis. If the chromosomes decondensed in telophase I, they condense again.
What is the difference between metaphase 1 and 2 in meiois?
Key Differences between Metaphase 1 and Metaphase 2 In metaphase 1, each pole receives half the number of chromosomes while in metaphase 2 have the same number of chromosomes but with a single chromatid. In metaphase 1, chromosomes are brought by the spindle fibers. In metaphase 1 of meiosis 1, homologous chromosomes are separated while in metaphase 2 of meiosis 2, sister chromatids are separated.