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Before mitosis the chromosome replicates a perfect copy of itself that is attached to itself. After mitosis each of these chromotids has moved to a seperate cell. The chromotid that has moved to the new cell is actually classed as a chromosome. Biologists have made this confusing by the way we are taught about chromosomes as we are shown them when they are in their visible form. They are only visible before mitosis when they bunch up tightly and become more dense and have replicated their DNA resulting in the double strand. The "chromatid" that moves to the new cell is in fact a new chromosome but the visual aid used to teach about chromosomes is the standard image of a double stranded "chromosome". Another key point i have found is that IPMAT (Inter, Meta, Pro, Ana and Telephase) as i was taught is not technically correct. Mitosis doesnt begin until the Prophase, the cell spends a large part of its life in the interphase which happens to be when the chromosome has been replicated in preperation for mitosis and also for other reasons. This is when it becomes double stranded again and apparently stays in the interphase for the majority of the time. A chromosome is also a single strand of DNA, thats something else that is worth remembering. It is tightly wound around proteins to help condense it and be able to fit it all into a cell nucleus, these are called histones and play key roles. Now if i could just figure out why some of the strands in a pair look different to one another when you look at autosomes on wikipaedia i will be happy. Autosomes just refer to chromosomes that aren't the sex determining chromosomes (X or Y)
What else can I help you with?
Difference between Meiosis 1 and 2?
Meiosis 1 involves the separation of homologous chromosomes, resulting in two haploid daughter cells with replicated chromosomes. Meiosis 2 involves the separation of sister chromatids, resulting in four haploid daughter cells with unreplicated chromosomes.
How do you chromosomes at end of meiosis i compare with the chromosomes at end of meiosis ii?
At the end of meiosis I, the chromosomes are duplicated (sister chromatids) and homologous chromosomes separate. At the end of meiosis II, the sister chromatids separate, resulting in four haploid daughter cells each with a single set of chromosomes. Meiosis II is similar to mitosis in terms of chromosome behavior as the sister chromatids separate.
How many chromosomes would a cell have during metaphase 1 of meiosis if it has 12 chromosomes during interphase?
Meiosis is known as a reduction division. The total number of chromosomes present prior to meiosis is reduced in half at the end of meiosis. In this case 12 pairs of chromosomes before meiosis (a total of 24 chromosomes) becomes 12 chromosomes (one of each pair) at the end of meiosis.
How is metaphase different in mitosis and meiosis?
In both mitosis and meiosis, metaphase is the stage where chromosomes line up in the middle of the cell. However, in mitosis, the chromosomes line up in a single row, while in meiosis, they line up in pairs. This is because meiosis involves two rounds of cell division, resulting in the separation of homologous chromosomes.
What phase in meiosis does the double stranded chromosomes move to the center of the cell and separate?
The phase you are referring to is metaphase I. In metaphase I of meiosis, homologous pairs of chromosomes line up at the cell's equator before they are separated and pulled to opposite ends of the cell during anaphase I.
Are chromosomes single or double in meiosi?
The chromosomes are double (diploid) at the beginning of meiosis. By the end of meiosis I, the chromosomes are single (haploid).
Does meiosis double the parental chromosomes number?
Meiosis 1
Difference between Meiosis 1 and 2?
Meiosis 1 involves the separation of homologous chromosomes, resulting in two haploid daughter cells with replicated chromosomes. Meiosis 2 involves the separation of sister chromatids, resulting in four haploid daughter cells with unreplicated chromosomes.
How do you chromosomes at end of meiosis i compare with the chromosomes at end of meiosis ii?
At the end of meiosis I, the chromosomes are duplicated (sister chromatids) and homologous chromosomes separate. At the end of meiosis II, the sister chromatids separate, resulting in four haploid daughter cells each with a single set of chromosomes. Meiosis II is similar to mitosis in terms of chromosome behavior as the sister chromatids separate.
What produces cell with half the normal number of chromosomes?
the answer is MEIOSIS meiosis produces 4 single cells with half member of the chromosomes mitosis produces 2 cells with full member of the chromosomes
What happens to the chromosomes in a cell in order for meiosis to begin?
They must double
How many chromosomes would a cell have during metaphase 1 of meiosis if it has 12 chromosomes during interphase?
Meiosis is known as a reduction division. The total number of chromosomes present prior to meiosis is reduced in half at the end of meiosis. In this case 12 pairs of chromosomes before meiosis (a total of 24 chromosomes) becomes 12 chromosomes (one of each pair) at the end of meiosis.
What is the product of meiosis two?
Haploid cells that contain single stranded chromosomes
How do metaphase of meiosis I and meiosis II differ?
It is different because pairs of chromosomes line up down the middle and in metaphase II single chromosomes are lined up across the middle
What is the term that refers to the cell containing a single set of chromosomes that results from meiosis?
A Haploid.
How is metaphase different in mitosis and meiosis?
In both mitosis and meiosis, metaphase is the stage where chromosomes line up in the middle of the cell. However, in mitosis, the chromosomes line up in a single row, while in meiosis, they line up in pairs. This is because meiosis involves two rounds of cell division, resulting in the separation of homologous chromosomes.
When does duplication of chromosomes occur?
when does the duplication of chromosomes occur?
