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In prophase, there are 46 condensed chromosome pairs. The chromosomes replicated during S phase (Doubling the original 23 pairs) and now appear as two sister chromatids connected via the centromere. During metaphase, the kinetochores of the chromatids attach to the spindle fibers and the chromosomes have now moved into position along the metaphase plate (an imaginary division) and are roughly central in the cell. During anaphase the spindles begin pulling the chromatids apart from one another and telophase begins. During telophase, the nuclear envelopes of the cells to be forms. At this point it's a tad murky as the chromosomes are clearly separated but the cell has not yet made a complete divide. The division completes during cytokinesis beginning with the formation of a cleavage furrow will separate the cytoplasm and eventually yields two daughter cells. At this point the cell will have 23 chromosome pairs.
The above is only true if we are talking about a somatic cell. If we are talking about a sex cell i.e a sperm or an egg then after the first meiotic division, there will be another one that follows the same processes as the first, only this time without the luxury of having undergone the replication during S phase and as such once cytokinesis finishes there will only be 23 single chromosomes in the given sex cell.
What else can I help you with?
In human cell undergoing mitosis how many chromosomes are present in prophase in metaphase in telophase?
In prophase, there are 46 chromosomes present, which are duplicated sister chromatids. In metaphase, there are still 46 chromosomes, but they are aligned along the metaphase plate. In telophase, the chromosomes have separated and there are once again 46 individual chromosomes in each daughter cell.
What phase of mitosis contains four chromosomes as its diploid or 2 number?
If you were to draw it, start with four, four "legged" chromosomes being split into eight, two "legged" ones, going though prophase, metaphase, anaphase, and telophase. Show them pulled by kinetichore microtubules, and two spindle poles on opposite sides. Don't forget to include the reformation of nuclear envelope in "telo", or the cleavage furrow between the still connected newly formed cells. Now throw nucleolus back into both. Don't include interphase.
During which phase of the cell cycle are duplicated chromosomes present?
The S phase in the interphase. Chromosomes are copied in the interphase part of the cell cycle S phase would be the answer. It is during Interphase (G1, S, G2) that they are copied. SO dependant on your answers it's either interphase or S.
In a diploid cell in which 2n equals 14 how many telomeres are there in each of the follow phases of the cell cycle a. G1 b. G2 c. mitotic prophase d. mitotic telophase?
There are two telomeres for each chromosome, so you need to figure out how many chromosomes there are at each stage and multiply that by two. G1-- growth phase: 14 chromosomes = 28 telomeres G2-- growth phase after replication in S phase: 28 chromosomes= 56 telomeres Mitotic Prophase-- before cell division, nuclear membrane disappears: 28 chromosomes= 56 telomeres Mitotic telophase-- nuclei separate: 14 chromosomes = 28 telomeres
How many chrosomes will be present in each cell at late telophase?
In mitosis: The amount of DNA present at the start of prophase would be 20, and at the end of telophase the amount of DNA present would be 10 as the cell has divided. Reference: Biology Student
In human cell undergoing mitosis how many chromosomes are present in prophase in metaphase in telophase?
In prophase, there are 46 chromosomes present, which are duplicated sister chromatids. In metaphase, there are still 46 chromosomes, but they are aligned along the metaphase plate. In telophase, the chromosomes have separated and there are once again 46 individual chromosomes in each daughter cell.
Spindle fibers are present in what stage of mitosis?
Spindle fibers are present in both prophase and metaphase stages of mitosis. In prophase, the spindle fibers start to form and separate the duplicated chromosomes. In metaphase, the spindle fibers attach to the centromeres of the chromosomes and align them along the cell's equator.
What are the phases present in mitosis?
Interphase (commonly not used but still important to mitosis), prophase, prometaphase (sometimes not used, but in higher education it is used because metaphase is so long), metaphase, anaphase, telophase/cytokinesis.
What happens to cell membranes during cell division?
During prophase the nuclear membrane disintegrates. The metaphase through anaphase the molecules are not formed as membranes. During telophase it reintegrates and in interphase it is present as normal.
How many sets of replicated chromosomes are present in each cell at the end of telophase you?
At the end of telophase, there are two sets of replicated chromosomes present in each cell. This is because during telophase, the duplicated chromosomes have separated and two identical sets of chromosomes are formed in preparation for cytokinesis.
What phase of mitosis contains four chromosomes as its diploid or 2 number?
If you were to draw it, start with four, four "legged" chromosomes being split into eight, two "legged" ones, going though prophase, metaphase, anaphase, and telophase. Show them pulled by kinetichore microtubules, and two spindle poles on opposite sides. Don't forget to include the reformation of nuclear envelope in "telo", or the cleavage furrow between the still connected newly formed cells. Now throw nucleolus back into both. Don't include interphase.
During which phase of the cell cycle are duplicated chromosomes present?
The S phase in the interphase. Chromosomes are copied in the interphase part of the cell cycle S phase would be the answer. It is during Interphase (G1, S, G2) that they are copied. SO dependant on your answers it's either interphase or S.
In a diploid cell in which 2n equals 14 how many telomeres are there in each of the follow phases of the cell cycle a. G1 b. G2 c. mitotic prophase d. mitotic telophase?
There are two telomeres for each chromosome, so you need to figure out how many chromosomes there are at each stage and multiply that by two. G1-- growth phase: 14 chromosomes = 28 telomeres G2-- growth phase after replication in S phase: 28 chromosomes= 56 telomeres Mitotic Prophase-- before cell division, nuclear membrane disappears: 28 chromosomes= 56 telomeres Mitotic telophase-- nuclei separate: 14 chromosomes = 28 telomeres
How many chrosomes will be present in each cell at late telophase?
In mitosis: The amount of DNA present at the start of prophase would be 20, and at the end of telophase the amount of DNA present would be 10 as the cell has divided. Reference: Biology Student
How many chromosomes are present during prophase?
23 pairs. So 46.
How many chromosomes are present at the end of telophase I?
You must first understand that the cells of different organisms contain different amounts of chromosomes. Humans contain 46. However, during interphase, a cell grows, prepares for mitosis, and doubles its chromosomes. That means 92 chromosomes are present at the end of mitosis. They are still attached (there are 46 pairs of chromosomes that do not split until anaphase).
Are homologous chromosomes present in both mitosis and meiosis?
Yes, homologous chromosomes are present in both mitosis and meiosis. In mitosis, homologous chromosomes do not pair up, while in meiosis, homologous chromosomes pair up during prophase I.
