9. Identify the stage of meiosis. Why is this stage critical to human development?twinkl.com

Name: 9. Identify the stage of meiosis. Why is this stage critical to human
Uploaded: 2024-03-20T06:42:55.000Z
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Description: 9. Identify the stage of meiosis. Why is this stage critical to human development?twinkl.com

The sequential events that result in genome duplication and followed by daughter cell formation are called the cell cycle. Interphase and the mitosis phase are the two major phases.The reduction division- wherein the chromosomes are reduced to half is the meiotic division. Meiosis I and II are two stages of this process. Prophase is followed by metaphase, anaphase, and telophase. When the two chromosomes of a tetrad start to move towards the opposite poles it marks the initiation of the first anaphase. During this stage, the homologous chromosomes separate while the sister chromatids still are associated at their centromere. Hence, the stage shown in the image is Anaphase I. Importance in human development- Crossing over and recombination are two important steps that occur in prophase I. Initiation of fist metaphase is marked by the alignment of recombined bivalent chromosomes on the equatorial/metaphase plate. During this phase, the microtubules of the spindle fibers attach to the homologous chromosomes. Anaphase results in the splitting of these chromosomes. The random alignment of chromosomes leads to a combination of parental characters. This means that the offspring will be having traits that are a blend of characters from both parents.