Prophase II is the phase that follows after meiosis I, or after interkinesis if present. If interkinesis takes place, the nuclear envelope and the nucleolus disintegrate during prophase II. The chromosomes are condensed. The centrosomes replicate and move towards the opposite poles.
What is the purpose of prophase 2?
Prophase II prepares the cell for secondary meiotic division where two haploid cells eventually form four haploid cells, each containing half of the genetic information previously contained in the original, replicated diploid cell.
What is the meaning of meiosis 2?
Meiosis II is the second division in meiosis in which chromatids of each chromosome are segregated equally into daughter cells. No DNA replication occurs during the interphase which precedes meiosis II. … By metaphase II, each chromosome is aligned at the metaphase plate. Anaphase II is the third step in meiosis II.
What 4 things happen during prophase?
- chromosomes condense and become visible.
- spindle fibers emerge from the centrosomes.
- nuclear envelope breaks down.
- nucleolus disappears.
What is the function of prophase?
Prophase is the first phase of mitosis, the process that separates the duplicated genetic material carried in the nucleus of a parent cell into two identical daughter cells. During prophase, the complex of DNA and proteins contained in the nucleus, known as chromatin, condenses.
Why do we need meiosis 2?
Meiosis comprises of two divisions- meiosis I and meiosis II. … Crossing over occurs during meiosis I. The meiosis II is simple division like mitosis and does not involves crossing over or reduction in number of chromosomes. The meiosis II serves to increase the number of daughter cells from 2 to 4.
What is the difference between meiosis 1 and meiosis 2?
There are two divisions in meiosis; the first division is meiosis I: the number of cells is doubled but the number of chromosomes is not. This results in 1/2 as many chromosomes per cell. The second division is meiosis II: this division is like mitosis; the number of chromosomes does not get reduced.
What are the 5 stages of prophase 1?
Meiotic prophase I is subdivided into five stages: leptotene, zygotene, pachytene, diplotene, and diakinesis.
What are the similarities between prophase 1 and prophase 2?
Both Meiosis 1 and 2 have the same phases: Prophase, Metaphase, Anaphase and Telophase. One difference is that Meiosis 1 starts with a diploid cell and Meiosis 2 starts with 2 haploid cells, each with a homologous pair. Meiosis 1 results in 2 daughter cells and Meiosis 2 results in 4.
What happens after prophase?
Metaphase happens after prophase. Mitosis occurs when the cell replicates the chromosomes and splits to form two daughter cells.