sister chromatid

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wonderkid
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sister chromatid

Post by wonderkid » Sat Aug 05, 2006 3:47 pm

why sometimes we must use the term' sister chromatid' instead of chromatid?
what is the difference btw sister chromatid and chromatid?

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fluktuacia
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Post by fluktuacia » Sat Aug 05, 2006 4:40 pm

I think it's used when speaking about cell division, because there is a difference btw. sister and "non-sister" chromatids in meiosis.Sister chromatids are parts of the same chromosome (are conected in centromeres) and eg. crossing over is made between non-sister chromatids (so btw. different chromosomes). When we'll use just name chromatide it won't be clear whether we are talking about chromatids of the same chromosome (sister ch.) or about chromatids belonging to different chromosomes ("non-sister" ch.).
i hope i'm right;)

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