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Doubt genetical

What is complete and incomplete linkage? Linkage is a case in all organisms or not? Does it occur in humans?
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Sharath Kumar K N Mandya | General Physician
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Hello, 1. Complete Linkage is The genes located on the same chromosome do not separate and are inherited together over the generations due to the absence of crossing over. Complete linkage allows the combination of parental traits to be inherited as such. It is rare but has been reported in male Drosophila and some other heterogametic organisms. 2. Incomplete Linkage is Genes present in the same chromosome have a tendency to separate due to crossing over and hence produce recombinant progeny besides the parental type. The number of recombinant individuals is usually less than the number expected in independent assortment. In independent assortment all the four types (two parental types and two recombinant types) are each 25%.
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