Biology - Gene Mapping - Results
Gene mapping - Results
Instead of the expected ratio of 1:1:1:1 of phenotypes  being observed
in the offspring, unexpected results were obtained. If it is assumed that
the genes for wing colour and size are actually on the same chromosome 
(rather than separate ones) but fairly widely separated, the first parent
P1 would mostly have GW or gw genotype.  Exchanging the ends of the
chromosomes during meiosis  (crossing over)  would give the
recombinant gametes  Gw and gW.
Gametes with the same combination of alleles  as the parent are called
parental. Those with new combinations of alleles are called recombinant.
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