For a cell with haploid number 3(6 chromosomes) draw the stages of mitosis?
At prophase, the haploid cell (n=3) would have 6 chromosomes present because each of the 3 chromosomes would have been replicated. Therefore, 6 chromosomes line up at the equatorial plate in metaphase, then sister chromatids segregate in anaphase. That is, one chromosome from each duplicated pair goes into opposite daughter cells. The end result is two identical daughter cells with 3 chromosomes each (haploid n =3). There are no longer 6 chromosomes b/c the daughter cells' chromosomes are not in the replicated state.
How many chromosomes will each cell receive after mitosis if human cell have 48 chromosomes after meiosis?
Meiosis is cell division that results in a cell with 1/2 the DNA of a normal cell. This cell would be an egg or sperm cell.Mitosis is normal cell division. The cell will create a copy of it’s DNA, resulting in 92 chromosomes temporarily in one cell, which will then split, creating two cells with 46 (23 pairs) chromosomes in them. If the cell then undergoes meiosis, it will be left with 23 chromosomes, unpaired.If you are asking about a theoretical organism with x number of chromosomes, which will become 48 after meiosis, you can work backwards to find x. After meiosis, the chromosomes number is .5 normal. So 48 x 2=96. There will be 96 (48 pairs) chromosomes in the nucleus. During mitosis there will temporarily be 192 chromosomes (96 pairs) until the cell splits in half during cytokinesis, ending mitosis with 96 chromosomes which is 48 pairs. This organism is likely a plant and is certainly not human.
If a cell with 24 chromosomes undergoes meiosis, how many cells will be formed after the process? How many chromosomes will each cell have?
We can divide the whole meiosis into 3 stages where we find the cell with difference in their chromosome or DNA number.1)- in s phase where replication takes place and DNA becomes double but during meiosis 1 becoz replication do not occur in the interphase of meiosis 2.2)- after meiosis 1 when chromosome become half but DNA remain the same and that is why we called meiosis 1 as reductional division.3)- after meiosis 2 when chromosome remain half and DNA also become half and that is why we called it equational division.So, after meiosis 1 two daughter cells forms with 12 chromosome and after meiosis 2, 4 daughter cells will be formed with 12 chromosome.
A cell has 46 chromosomes at each pole in mitotic telophase. In this division, what was the number of chromatids at the metaphase stage?
During telophase, the poles are having 46 chromosomes. From this we can conclude that the cell had undergone Mitotic division as the number of the chromosomes remains same.Now at the metaphase stage, there will be two set of 46 chromosomes as replication of all the 46 chromosomes took place during S-phase.Each chromosome before replication was having single chromatid. After replication the chromatids joined together by cohesin molecules. Hence before replication the number chromatids were 46. After replication as the chromatids were merged into one chromosomes,46*2= 92 chromatids.Hence, during the metaphase, there will be 92 chromatids at the metaphase plate.*correct me If I am wrong.
If a cell contains 32 bivalent, then how many chromosomes and chromatids are there?
Each bivalent has a pair of homologous chromosome and each chromosome has two sister chromatids. Therefore, your answer is 64 chromosomes and 128 chromatids
If humans have only 46 chromosomes in the body cells, doesn't that mean the definition of our species should be it has 23 chromosomes?
Hi Shirley Day,Thanks for the question,Understand your point.Firstly to avoid confusion, nearly all the different types of cells in your body can undergo mitosis, meiosis in human beings occurs only in cells that will become either eggs or sperm. So, in humans, mitosis is for growth and maintenance, while meiosis is for sexual reproduction.Haploid cells that are generated through meiosis, such as egg and sperm, only have 23 chromosomes, because, remember, meiosis is a "reduction division." Makes all cells other than gametes. However from here, in order for us to be a human species.At first the cells have the same number of chromosomes as mitosis. DNA replication occurs, giving a total of 46 chromosomes (or 23 chromosome pairs) and 92 chromatids (or 46 chromatid pairs).Meiosis I: In meiosis I, the homologous chromosomes separate. In this case, the pairs of sister chromatids are still attached to each other. So at this stage, the daughter cells get 23 chromosomes each (of the pair of homologous chromosomes) and 46 chromatids in total (which are actually 23 pairs of sister chromatids attached at the centromere). This is known as reductional division, as the total number of chromosomes is halved at this stage.Meiosis II: Meiosis II follows the same division as mitosis, except that there are only half as many chromosomes. So the 23 chromatid pairs from the previous cells (or 46 chromatids in total) split equally, so each daughter gets 23 chromatids exactly, which correspond to 23 chromosomes. Meiosis II is known as equational division.During fertilisation the sperm plasma fuses with the egg's plasma membrane, the sperm head disconnects from its flagellum and the egg travels down the Fallopian tube to reach the uterus. We have 23 pairs (23 from the sperm and 23 from the egg) of chromosomes (which contain our DNA), so 46 in total.Hope that helps,If you liked the response please up-vote and follow,Video responses coming soon,R.