Crossing over

Crossing over
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  • This cell contains two chromosomes. The chromosomes are considered non-sister chromosomes because they are different from each other.
  • B A
  • Amy is a red chromatid and Bellinda is a blue chromatid. They are not sisters but they are best friends. They might become separated in their cell soon. Therefore, the will cross over each other so that they will always have a piece of each other with them. Now, they will never forget the good friendship they shared.
  • B A
  • b a
  • b a
  • B A
  • The non-sister chromatids cross over to begin the process of delivering an opposite segment to the other chromatid.
  • b a
  • B A
  • b a
  • B A
  • Now, Amy and Bellinda have a piece of each other as a part of them. This will help them always remember each other
  • B a
  • b A
  • b a
  • 
  • In real life, cells undergo meiosis and cross over all the time. Doing this creates new combinations of genes that are not found in either parent, contributing to genetic diversity. This is one of the reasons why offsprings do not always look like the parents.
  • THE END
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