26) Suppose the L and M genes are on the same chromosome but separated by 100...
26) Suppose the L and M genes are on the same chromosome but separated by 100 map units. What fraction of the progeny from the cross L M / l m × l m / l m would be L m / l m?
Homework Answers
recombination frequency in percentage is the distance between genes in map units.
here distance between genes in map units is 100 map units,
the maximum recombination frequency is 50%, if the recombination frequency between the genes is more than 50% the genes are not linked on a chromosome.
here the distance between the genes is 100 map units so the genes are not linked.
LM / lm * lm/lm
| LM | Lm | lM | lm | |
| lm | LM/lm | Lm/lm | lM/lm | lm/lm |
the expected ratio is
LM/lm:Lm/lm:lM/lm:lm/lm=1:1:1:1
all the genotypes are expected in the equal proportion=1/4 that is 25% each
fraction of the progeny from the cross L M / l m × l m / l m would be L m / l m= 1/4
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