AP BIOLOGY

HEREDITY

CROSSOVER

Question [CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
Coupling and repulsion are the two faces of
A
Crossing over
B
Linkage
C
Chiasmata
D
Mutation
Explanation: 

Detailed explanation-1: -Coupling and Repulsion are two faces of crossing over and linkage as when two genes are present on the same chromosome, they are linked and so, crossing over cannot occur.

Detailed explanation-2: -Coupling and repulsion are the two faces of.

Detailed explanation-3: -Coupling is the condition where the genes that are coming from the identical parents enter the same gamete are inherited together. In repulsion, the genes are coming from different parents and therefore are separated in different gametes which are separately inherited. >

Detailed explanation-4: -The two faces of mutation: extinction and adaptation in RNA viruses.

Detailed explanation-5: -The coupling phase is the phase when the two genes inherit together. It causes variability. In the figure, the two genes A and B are located on the same gene and are inherited together and shows linkage in the coupling phase.

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