Chromosomes Pair_(Posted by Neha)

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nehamishra1
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Chromosomes Pair_(Posted by Neha)

Post by nehamishra1 » Sun Nov 29, 2009 12:59 pm

As we know we have 46 chromosomes in our cells, but it written in books that these chromosomes are paired means there are 23 pairs of chromosome, then what is criteria of making pairs, are the pairs made according to the function of chromosomes or Size. For example In a pair of chromosomes both of the chromosomes have similar size and function ?

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JackBean
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Post by JackBean » Mon Nov 30, 2009 2:11 am

In a pair of chromosomes they have basically the same size and function. They are, what we call homologous, that is, they contain the same set of genes and other DNA, althrough the real sequence can differ (see alleles), so the exact size and function can differ a little (e. g. gene on one chromosome can have deletion -> different size or the gene can code for non-functioning product -> different function), but basically, they are still "the same" (homologous)
http://www.biolib.cz/en/main/

Cis or trans? That's what matters.

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TheVirus
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Post by TheVirus » Sat Dec 05, 2009 11:49 pm

They are called 23 pairs because we have 1 pair (2) of each chromosomes.
”It is not the strongest of the species that survives, nor the most intelligent that survives. It is the one that is the most adaptable to change.”
~Charles Darwin

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