What is meiosis? What is a cell? What is a stem cell? How helpful was this page? What's the main reason for your rating? Which of these best describes your occupation? What is the first part of your school's postcode?
How has the site influenced you or others? When the homologous chromosomes separate and move to opposite poles during meiosis I, the diploid level is reduced from two to one, which is referred to as a reduction division.
What is the difference between daughter cells produced by meiosis and daughter cells produced by mitosis? Biology The Eukaryotic Cell Meiosis.
Jan 14, Explanation: The main differences between mitosis and meiosis occur in meiosis stage I. Related questions How does meiosis 1 differ from meiosis 2? Meiosis II is not a reduction division because, although there are fewer copies of the genome in the resulting cells, there is still one set of chromosomes, as there was at the end of meiosis I. Meiosis II is, therefore, referred to as equatorial division. Learning Objectives Compare and contrast mitosis and meiosis.
Key Points For the most part, in mitosis, diploid cells are partitioned into two new diploid cells, while in meiosis, diploid cells are partitioned into four new haploid cells. In mitosis, the daughter cells have the same number of chromosomes as the parent cell, while in meiosis, the daughter cells have half the number of chromosomes as the parent.
The daughter cells produced by mitosis are identical, whereas the daughter cells produced by meiosis are different because crossing over has occurred. The events that occur in meiosis but not mitosis include homologous chromosomes pairing up, crossing over, and lining up along the metaphase plate in tetrads. Meiosis II and mitosis are not reduction division like meiosis I because the number of chromosomes remains the same; therefore, meiosis II is referred to as equatorial division.
When the homologous chromosomes separate and move to opposite poles during meiosis I, the ploidy level is reduced from two to one, which is referred to as a reduction division.
Key Terms reduction division : the first of the two divisions of meiosis, a type of cell division ploidy : the number of homologous sets of chromosomes in a cell equatorial division : a process of nuclear division in which each chromosome divides equally such that the number of chromosomes remains the same from parent to daughter cells.
Comparing Meiosis and Mitosis Mitosis and meiosis are both forms of division of the nucleus in eukaryotic cells. Meiosis begins with a parent cell that is diploid, meaning it has two copies of each chromosome.
The parent cell undergoes one round of DNA replication followed by two separate cycles of nuclear division. The process results in four daughter cells that are haploid, which means they contain half the number of chromosomes of the diploid parent cell.
Meiosis has both similarities to and differences from mitosis, which is a cell division process in which a parent cell produces two identical daughter cells. Meiosis begins following one round of DNA replication in cells in the male or female sex organs. The process is split into meiosis I and meiosis II, and both meiotic divisions have multiple phases.
Meiosis I is a type of cell division unique to germ cells, while meiosis II is similar to mitosis. Meiosis I, the first meiotic division, begins with prophase I.
During prophase I, the complex of DNA and protein known as chromatin condenses to form chromosomes. The pairs of replicated chromosomes are known as sister chromatids, and they remain joined at a central point called the centromere.
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