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Question
Define complete linkage. Give an example of a cross, showing complete linkage.
Solution
Complete linkage:
It is a type of inheritance in which only the parental types appear in the progeny and the cross overs or recombinant types are absent. Here, the genes for the characters are linked genes and occur closely on the same chromosome and do not show independent assortment. Crossing over is absent between the linked genes.
The following cross shows complete linkage.
The F females of the above cross are crossed with homozygous recessive males. The ratio comes out to be 9: 1: 1: 8. The two genes did not segregate independently.
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