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All genes located on the same chromosome:

All genes located on the same chromosome form one linkage group. Physical association between genes is termed as linkage. A linkage group is a group of linked gene present on same chromosome and corresponds to the genome of organism.

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Conditions of a karyotype 2n +1, 2n –1 and 2n + 2, 2n – 2 are called:

 3

Distance between the genes and percentage of recombination shows:

 4

If a genetic disease is transferred from a phenotypically normal but carrier female to only some of the male progeny, the disease is:

 5

In sickle cell anaemia glutamic acid is replaced by valine. Which one of the following triplets codes for valine?