Meiosis - Wikipedia
网页In meiosis, the chromosomes duplicate (during interphase) and homologous chromosomes exchange genetic information (chromosomal crossover) during the first division, called meiosis I. The daughter cells divide again in meiosis II, splitting up sister chromatids to form haploid gametes.
Meiosis | Definition, Process, Stages, & Diagram | Britannica
网页4 天之前 · meiosis, division of a germ cell involving two fissions of the nucleus and giving rise to four gametes, or sex cells, each possessing half the number of chromosomes of the original cell. A brief treatment of meiosis follows.
Genetics, Meiosis - StatPearls - NCBI Bookshelf
网页2023年8月14日 · The body is made up of trillions of somatic cells with the capacity to divide into identical daughter cells facilitating organismal growth, repair, and response to the changing environment. This process is called “mitosis.”. In the gametes, a different form of cell division occurs called “meiosis.”.
7.2: Meiosis - Biology LibreTexts
网页Meiotic divisions are two nuclear divisions that produce four daughter nuclei that are genetically different and have one chromosome set rather than the two sets the parent cell had. The main differences between the processes occur in the first division of meiosis.
Meiosis - National Human Genome Research Institute
网页2 天之前 · Meiosis is a type of cell division in sexually reproducing organisms that reduces the number of chromosomes in gametes (the sex cells, or egg and sperm). In humans, body (or somatic) cells are diploid, containing two sets of chromosomes (one from each parent).
meiosis | Learn Science at Scitable - Nature
网页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 ...
14.12: The Process of Meiosis - Biology LibreTexts
网页2022年7月31日 · Explain the mechanisms within meiosis that generate genetic variation among the products of meiosis. Sexual reproduction requires fertilization, the union of two cells from two individual organisms. If those two cells each contain one set of chromosomes, then the resulting cell contains two sets of chromosomes.
3.1.2: The Process of Meiosis - Biology LibreTexts
网页Explain the differences between meiosis and mitosis. Explain the mechanisms within the meiotic process that produce genetic variation among the haploid gametes. Sexual reproduction requires the union of two specialized cells, called gametes, each of which contains one set of chromosomes.
Meiosis - Function, Phases and Examples - Biology Online
网页2022年5月30日 · Meiosis is a form of cell division in sexually reproducing organisms wherein two consecutive nuclear divisions (meiosis I and meiosis II) occur without the chromosomal replication in between, leading to the production of four haploid gametes, each containing one of every pair of homologous chromosomes (that is, with the maternal and …
Meiosis, Genetic Recombination, and Sexual Reproduction
网页Meiosis, from the Greek word meioun, meaning "to make small," refers to the specialized process by which germ cells divide to produce gametes. Because the chromosome number of a species remains...
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