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iren2701 [21]
3 years ago
7

Why are there two versions of chromosomes

Biology
1 answer:
guapka [62]3 years ago
4 0

Answer:

See below

Explanation:

There are two different types of chromosomes coming from the ribosomes of a single cell. This is simply because you inherit traits from both your mother and father when you are given birth to. So, there are two types of genes which do not pair and therefore form two types of chromosomes.

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During the Anaphase I of meiosis, the pairs of homologous chromosome split up. During this phase sister chromatids of each pair is formed and start moving towards the opposite poles. By the end of anaphase  out of each pair of sister chromatids , reaches to the poles of the spindle fibre.  During the metaphse of meiosis the chromosomes start their movements and arrange themselves between the poles and the equator of the spindle.  

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