What is meiosis Ncert?
Meiosis is divided into two phases – meiosis I and meiosis II. In the first meiotic division the homologous chromosomes pair to form bivalents, and undergo crossing over. Meiosis I has a long prophase, which is divided further into five phases. These are leptotene, zygotene, pachytene, diplotene and diakinesis.
What is meiosis explain?
Meiosis is a type of cell division that reduces the number of chromosomes in the parent cell by half and produces four gamete cells. This process is required to produce egg and sperm cells for sexual reproduction. … Meiosis begins following one round of DNA replication in cells in the male or female sex organs.
What is meiosis in biology class 10?
Meiosis is a type of cell division during which a single cell divides twice and produces four daughter cells. These four daughter cells contain half the amount of genetic material and known as our sex cells (gametes).
What is meiosis short answer?
Meiosis is a process where a single cell divides twice to produce four cells containing half the original amount of genetic information. These cells are our sex cells – sperm in males, eggs in females. … These four daughter cells only have half the number of chromosomes? of the parent cell – they are haploid.
What is meiosis and mitosis Class 10?
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 are the 7 steps of meiosis?
Therefore, meiosis includes the stages of meiosis I (prophase I, metaphase I, anaphase I, telophase I) and meiosis II (prophase II, metaphase II, anaphase II, telophase II).
What is the need of meiosis in cell division Class 11?
– Meiosis is responsible for the formation of the gametes, responsible for sexual reproduction. – It activates the genetic information for the development of gametes. – It reduces the number of chromosomes to half in gametes cells and helps in maintaining the constant number of chromosomes.