Meiotic divisions
The two meiotic divisions may be divided into a number of distinct stages. Meiotic prophase refers to the period after the last cycle of DNA replication, during which time homologous chromosomes pair and recombine. The end of prophase is signaled by the breakdown of the nuclear envelope, and the association of the paired chromosomes with the meiotic spindle. The spindle is made up of microtubules that, with associated motor proteins, mediate chromosome movement. In some cases (such as human sperm formation), the spindle is already formed at the point of nuclear envelope breakdown, and the chromosomes then attach to it. In other systems (such as human female meiosis), the chromosomes themselves organize the spindle.
Metaphase I is the period before the first division during which pairs of interlocked homologous chromosomes, called bivalents, line up on the middle of the meiotic spindle. The chromosomes are primarily (but not exclusively) attached to the spindle by their centromeres such that the centromere of one homolog is attached to spindle fibers emanating from one pole, and the centromere of its partner is attached to spindle fibers from the other pole (see illustration). The bivalents are physically held together by structures referred to as chiasmata that are the result of meiotic recombination events. In most meiotic systems, meiosis will not continue until all of the homolog pairs are properly oriented at the middle of the spindle, the metaphase plate. The orientation of each pair of homologs on the spindle occurs in a random fashion, such that the paternally derived homolog of one bivalent may point toward one pole of the spindle, while in the adjacent bivalent the maternally derived homolog is oriented toward the same pole.
Reproductive (sex) cells are involved in meiosis, while body cells are involved in mitosis.
After mitosis you have two cells and after meiosis you have 4 cells.
meiosis produces four haploid gamete cells.
Meiosis is the name of the type of cell division that forms eggs and sperm. Mitosis is the other kind of cell reproduction, which forms most other types of cells.
Meiosis 1 have 23 daughter cells.
Four daughter cells are produced in meiosis.
Meiosis produces gametes.
The answer is 42 hours
Haploid cells Sex cells Reproductive cells Sperm & oocytes
Meiosis is purely for the production of sex cells. When one cell undergoes meiosis, it turns into ethier 4 sperms cells for a male or 3 extra cells and 1 egg cell for a female.
The male and female sex cells (sperms and ovaries respectively) undergo meiosis so that when they rejoin during fertilization, the zygote formed has the correct number of chromosomes. No other kinds of cells undergo meiosis.
Fission. There are two types: mitosis and meiosis.
There are two types of cell division-mitosismeiosisThe difference in between them is that mitosis takes place in vegetative cells while meiosis in reproductive cells.
Spermatogenesis and oogenesis are two types of meiosis that are carried out by humans. This is the activity of the human body producing sperm and egg cells for reproduction.
Body cells do not undergo meiosis. Reproductive cells undergo meiosis, body cells, mitosis.
Diploid,eukaryotic cells undergo meiosis.Four haploid cells are prodced.Diploid cells are made after fertilization.
Meiosis and mitosis are different types of cellular reproductions. Meiosis is sexual but mitosis is asexual reproduction. Meiosis and mitosis continue to occur when the immune system produces white blood cells.
Cells which produce gametes (sex cells) undergo meiosis.