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What stage is when sex cells form with half the number of chromosomes as the parental cells?
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∙ 13y ago
In meiosis (cell division to form gametes), the division that makes the cell haploid is called anaphase II. At anaphase I the homologous pairs are separated, but in anaphase II the chromatids are separated, which makes the cell haploid (the number of chromosomes is halved)
Wiki User
∙ 13y ago
Anonymous
Aydin Brown
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Why does meiosis result 1N cells rather than 2N cells?
During meiosis chromosomes are segregated at Anaphase I stage , this results in reduction in number of chromosomes from 2N to 1N .
Is secondary spermatocyte haploid or diploid why?
secondary oocytes are haploid cells carrying 23 chromosomes. After fertilization by sperm a Zygote is formed with a diploid number 46.
What stage of meiosis is the chromosome number reduced?
In Anaphase I
Which cells would you expect to be haploid?
Firstly, a haploid cell is a cell that contains one set of chromosomes (n). Some examples include gametes (sperm and egg) and prokaryotes. Also, plants have haploid stages in their alternation of generations (or life cycles). This stage is called the gametophyte.
How many chromosomes will the resulting cells have in mitosis?
This depends both on the cell undergoing mitosis and the stage in mitosis which is currently underway. Humans have 46 chromosomes per cell, but in some stages of mitosis have 92. Dogs have 78 chromosomes, but at some stages of mitosis have 156.
How many chromosomes does a pigeon have?
Okay, so a pigeon has 80 chromosomes when its cells are in the diploid stage. In the haploid stage the cells have 40 chromosomes.
Why does meiosis result 1N cells rather than 2N cells?
During meiosis chromosomes are segregated at Anaphase I stage , this results in reduction in number of chromosomes from 2N to 1N .
What is the stage that chromosomes separate?
What is Half of the number of chromosomes
How does reproduction of a unicellular occur?
the cell splits evenly in half in 5 stages in the 1st stage the cell grows and the chromosomes double, in the 2nd stage the nucleus disappears, In the 3rd stage the chromosomes line up in the middle, in the 4th stage the chromosomes and organelles are split evenly and the cells begin to separate, in in 5th stage, 2 identical cells split apart and become 2 separate cells
Is secondary spermatocyte haploid or diploid why?
secondary oocytes are haploid cells carrying 23 chromosomes. After fertilization by sperm a Zygote is formed with a diploid number 46.
What stage of meiosis is the chromosome number reduced?
In Anaphase I
What stage is it when all the cells show crossover chromosomes?
The stage when all the cells show crossover chromosomes is the pachytene stage of meiosis. During this stage, homologous chromosomes pair up and exchange genetic material through a process called recombination or crossing over, which results in the formation of new combinations of genetic information.
Which stage of cells cycle do the chromosomes replicated?
Chromosomes replicate when DNA replicates during the S phase (synthesis) of of the cell cycle.
Which stage of a cells cycle do the replicated chromosomes line up on the equator of the cell?
Metaphase
Description of chromosomes?
Chromosomes are counted differently depending on the stage of the cell cycle. To count the number of chromosomes, one could count the number of functional centromere. The number of DNA molecules is usually the number of chromatids.
Are egg cells and sperm cells like body cells?
Yes. Egg cells and sperm cells are like body cells in their structure, but there is one major difference: eggs and sperm cells have a different number of chromosomes than body cells.In humans, each body cell (otherwise known as a somatic cell) contains 46 chromosomes inside its nucleus. These chromosomes carry the cell's genetic information. When somatic cells reproduce through cell division, they must copy their chromosomes so that each of the two resulting cells (or daughter cells) receives 46 chromosomes. We say that the somatic cells are diploid cells as they have "two sets" of chromosomes, or 2n chromosomes: in the case of humans, n = 23, so 2n = 46.However, in sperm and egg cells, there are only nchromosomes, meaning that they are haploid cells: for humans, this means that each sperm and egg cell contains 23 chromosomes. The reason that these reproductive cells (or gametes) contain half the number of chromosomes of a body cell is because an egg and a sperm cell will fuse to form a zygote, the first stage of a developing child. With the egg and sperm cells each donating 23 chromosomes to the child, the child will have the 46 chromosomes it needs.The fact that the sperm of the father and the egg of the mother each contributes half of the required number of chromosomes ensures that the offspring will be "genetically diverse."
Main stage of meiosis?
The main stage of meiosis is called the "reduction division" or "meiosis I." During this stage, homologous chromosomes pair up and exchange genetic information through a process called crossing over. They then separate, resulting in two cells with half the number of chromosomes as the original cell. Meiosis II then follows, where sister chromatids separate, resulting in four non-identical daughter cells.
