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In shortorn cattle genes for red (r(1))a...

In shortorn cattle genes for red `(r_(1))`and white `(r_(2))` coat colour occcur. Crosses between red `(r_(1)r_(2))` and white `(r_(2)r_(2))` produced `(r_(1)r_(2))` roan. This an example of

A

epistasis

B

co-dominance

C

complementary genes

D

incomplete dominance

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The correct Answer is:
B
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