Re: frequency of crossovers at meiosis
- From: "Perplexed in Peoria" <jimmenegay@xxxxxxxxxxxxx>
- Date: Fri, 22 Feb 2008 13:49:17 -0500 (EST)
<pslant@xxxxxxxxx> wrote in message news:fpfa4m$2e5n$1@xxxxxxxxxxxxxxxxxxxxxx
I read that mendels second law (saying that traits are inherited
independently) if either
1) the genes regultating the traits reside on different chromosones
2) the genes are far from each other on the same chromosone
Can this really be true for 2) ?
If even nr of crossovers (including 0) is as common as odd, the traits
are more likely to follow each other than if the genes are at separate
chromosones.
Am I thinking about this wrong ?
I can't tell. Genes on different chromosomes have a linkage (% recombination)
of exactly 0.5. Pairs of genes on the same chromosome have a linkage
which approaches 0.5 asymptotically as the distance between the genes on the
chromosome increases.
So if you were pointing out that 'asymptotically approaches' is not quite
the same thing as 'exactly equals' then you are thinking right (but a bit
too pedantically, IMHO). Otherwise, you may be thinking wrong.
.
- References:
- frequency of crossovers at meiosis
- From: pslant
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