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Match the following w.r.t linkage groups
1.Complete Linkage a.refers to linkage either between dominant genes or recessive genes
2.Repulsion Linkage b.some frequency of crossing over also occurs between linked genes
3.Incomplete Linkage c.linkage of some dominant genes with some recessive genes
4.Coupling Linkage d.Linkage in which crossing over does not occur

Option: 1
1.a.,2.c.,3.d.,4.b.

Option: 2
1.d.,2.c.,3.b.,4.a.

Option: 3
1.c.,2.b.,3.d.,4.a.

Option: 4
1.b.,2.d,3.a.,4.d.

Answers (1)

best_answer

As we have discussed in Linkage Groups & Types of Linkage -

Complete Linkage:

Linkage in which crossing over does not occur is known as complete linkage or absolute linkage. In other words, when only parental types are obtained from the test cross progeny, it refers to complete linkage.

Incomplete Linkage:

If some frequency of crossing over also occurs between linked genes, it is known as incomplete linkage. To put it another way, when recombinations are also observed in the test cross progeny, besides parental combinations, it refers to incomplete linkage.

Coupling Linkage:

It refers to linkage either between dominant genes or between recessive genes. Such linkage has been reported in pea, maize and several other crops.

Repulsion Linkage:

It refers to the linkage of some dominant genes with some recessive genes. This type of linkage has also been observed in pea, maize and several other crops.

Hence, the correct option is (b).

Posted by

Ritika Kankaria

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