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Sex cells are formed through a particular kind of cell division called meiosis During meiosis, two successive rounds of division. Unlike in normal cell division (mitosis), the genetic material of the original (parent) cell is divided up twice.
Meiosis, division of a germ cell involving two fissions of the nucleus and giving rise to four gametes, or sex cells, each with half the number of chromosomes of the original cell Meiosis is the mechanism used to reduce diploid cells to haploid gametes while introducing genetic diversity The process of meiosis is characteristic of organisms that reproduce sexually and have a diploid set of chromosomes in the nucleus.
Meiosis produces haploid gametes from a diploid cell
Dna replicates once, but the cells divide twice In biology, meiosis is the process where a cell replicates dna once but divides twice, producing four cells that have half the genetic information of the original cell It is how organisms produce gametes or sex cells, which are eggs in females and sperm in males In meiosis one cell divides.
Almost all males have one x sex chromosome and 1 y sex chromosome, and almost all females have 2 x sex chromosomes, in each cell Gametes are unique in that they have half of the chromosomes of other cells Only one sex chromosome and only 22 other chromosomes, not 22 pairs. 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)
To maintain this state, the egg and sperm that unite during fertilization must be haploid, with a single set of chromosomes Figure 11.2 overview of meiosis The production of gametes is a crucial process for sexually reproducing organisms
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