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- The cells which divide by meiosis are called meiocytes. In animals the primary oocytes and primary spermocytes are meiocytes. In most of the higher plants the meiocytes are sporocytes (spore mother cells) giving rise to microspores or pollen grains (male sex) and megaspores (female sex). In haploid plants, the zygotes act as meiocytes.
www.biologydiscussion.com › meiosis › meiosis-subject-matter-and-types-with-diagram-cell-divisionMeiosis: Subject-Matter and Types (With Diagram) | Cell Division
Oct 21, 2023 · It is how organisms produce gametes or sex cells, which are eggs in females and sperm in males. In meiosis one cell divides twice, forming four cells. The daughter cells are haploid (n), having half of the chromosome number of the original cell, which is diploid (2n).
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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.
The two cells produced in meiosis I go through the events of meiosis II in synchrony. During meiosis II, the sister chromatids within the two daughter cells separate, forming four new haploid gametes.
Jul 31, 2022 · In some organisms, the chromosomes decondense and nuclear envelopes form around the chromatids in telophase I. In other organisms, cytokinesis—the physical separation of the cytoplasmic components into two daughter cells—occurs without reformation of the nuclei.
Oct 16, 2018 · In humans, special cells called germ cells undergo meiosis and ultimately give rise to sperm or eggs. Germ cells contain a complete set of 46 chromosomes (23 maternal chromosomes and 23...
- Aparna Vidyasagar
Dec 27, 2021 · Describe cellular events during meiosis. Explain the differences between meiosis and mitosis. 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.
Sexual life cycles involve an alternation between meiosis and fertilization. Meiosis is where a diploid cell gives rise to haploid cells, and fertilization is where two haploid cells (gametes) fuse to form a diploid zygote.
