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This is because the cells must have genetic variation so that people can be different 

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This is because the cells must have genetic variation so that people can be different 

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Started as one cell then divided into 2. then those 2 split into 4

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Started as one cell then divided into 2. then those 2 split into 4

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-4 different cells were made in the end

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At the end, there was four cells in total, each different and unique. The cells each only had one chromatid which was different from the others.

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the nucleus dissolved as the chromosomes divided

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each cell division led to have half of the genetic material in each cell

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each cell division led to have half of the genetic material in each cell

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at the first cell the chromosomes were unorganized and did not have a defined shape

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Centrioles pull chromosome pairs apart. 

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Centrioles pull chromosome pairs apart. 

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During second division Chromatids were separated 

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During second division Chromatids were separated 

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During the first division the pairs of chromosomes overlap and exchange pieces causing a change in the genetic material inside the chromosome 

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During the first division the pairs of chromosomes overlap and exchange pieces causing a change in the genetic material inside the chromosome 

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The two new cells contain the opposite chromosomes. - BIG GOES WITH BIG LITTLE GOES WITH LITTLE

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The two new cells contain the opposite chromosomes. - BIG GOES WITH BIG LITTLE GOES WITH LITTLE

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and one of each color

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EACH DIVISION HALVES THE CHROMOSOME NUMBER

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EACH DIVISION HALVES THE CHROMOSOME NUMBER

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The nucleus was dissolved and reconstructed many times during the process 

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The nucleus was dissolved and reconstructed many times during the process 

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Each cell was different because when a cell split 2 different chromosomes of different sizes and colors are put together. In the end when there are 4 cells the chromatids are different because each one only has half the DNA and some of the DNA is mixed

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The Nucleus dissolves because the Centrioles need to be able to pull apart the Chromosomes

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The Nucleus dissolves because the Centrioles need to be able to pull apart the Chromosomes

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Sex cells only have half of the genetic material a normal cell would have so that it can combine with another sex cell to create a diploid embryo with the full 46 chromosomes

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at the first cell the chromosomes were unorganized and did not have a defined shape

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at the first cell the chromosomes were unorganized and did not have a defined shape

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Organized ch. are easier to move to around the cell- harder to split them evenly

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Centrioles divide chromosomes so that the cells can divide and have equal amounts of genetic material

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During second division Chromatids were separated

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During second division Chromatids were separated

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The centrioles seperated the chromatids by pulling them apart, leading to the making of four new and individual cells.

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The pairs of chromosomes exchange pieces

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The pairs of chromosomes exchange pieces

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The pairs of chromosomes overlap and exchange genetic material so that each organism is different and unique/ there is genetic variation.

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The big chromosomes pair up with the big ones because the small ones are not able to pair up equally with them. This is also vise versa for the small ones. With the connecting they connect from endpoint to endpoint in order to share a little DNA. But if it was a small one the DNA wouldn't be equally shared

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EACH DIVISION HALVES THE CHROMOSOME NUMBER

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EACH DIVISION HALVES THE CHROMOSOME NUMBER

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Centrioles spit the pairs of chromosomes and each take 1 chromosome, each taking the same amount. - 2nd division the centriols split about the chromosome taking one chromatid to each side

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Nucleus dissolving and reconstructing multiple times.

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Nucleus dissolving and reconstructing multiple times.

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It dissolves so that the centrioles access the chromosomes.
It reconstructs so that the cell can function and store the chromosomes along with other info.
Allows ch. to move freely

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Meiosis creates gametes . When and individual creates gametes each gamete they make can look different( because of crossing over and how they line up). Even though the twins had the same parents. the mom did meiosis to make gamates and every time each egg could have been different. Therefor each sibling could get a different set of dna from the mom. The same goes for the dad.
Beacuse meiosis makes it so each egg cell is different and in men each sperm cell is different siblings can get different sets of DNA from each parent

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Chromosomes overlap and exchange genetic material differently. This causes variation in the cells, as the process is repeated through division. In this case, the twin's cells were diverse because the parents sex cells transferred genetic material differently, resulting in variation among each cell. When the sperm and egg combined for each twin sister, they were very different due to changes undergone during the haploid's cell initial cell division. Subsequently, the children had diverse phenotypes.