Like mitosis, meiosis also has distinct stages called prophase, metaphase, anaphase, and telophase.
What are the events in meiosis?
Major Events in Meiosis
|Prophase I||Chromosomes condense , homologous chromosomes synapse, crossing over takes place, nuclear envelope break down and mitotic spindle forms.|
|Metaphase I||Homologous pairs of chromosomes line up on the metaphase plate.|
What are the major events of meiosis and when do they occur?
Chromosomes condense, homologous chromosomes synapse, crossing over takes place, nuclear envelope breaks down, and mitotic spindle forms. You just studied 11 terms!
What are the key features of meiosis?
Features of Meiosis
- It results in the formation of four daughter cells in each cycle of cell division.
- The daughter cells are identical to the mother cell in shape and size but different in chromosome number.
- The daughter cells are haploid.
- Recombination and segregation take place in meiosis.
What is the difference between mitosis and meiosis?
Cells divide and reproduce in two ways, mitosis and meiosis. Mitosis results in two identical daughter cells, whereas meiosis results in four sex cells. Below we highlight the keys differences and similarities between the two types of cell division.
What is prophase in cell division?
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 is prophase important?
Prophase I highlights the exchange of DNA between homologous chromosomes via a process called homologous recombination and the crossover at chiasma(ta) between non-sister chromatids. Thus, this stage is important to increase genetic variation.
What happen in prophase 1?
During prophase I, homologous chromosomes pair and form synapses, a step unique to meiosis. The paired chromosomes are called bivalents, and the formation of chiasmata caused by genetic recombination becomes apparent. Chromosomal condensation allows these to be viewed in the microscope.