A blue fowl was obtained after crossing between a white and black fowl. Then the ratio of their $F_{2}$ generation will be

3:1

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9:7

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1:2:1

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13:3

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Solution

The correct option is B 1:2:1
If a blue fowl was obtained by crossing a black and white fowl, it is an example of incomplete dominance.
Black fowl (BB) X White fowl (bb)
F $_{1}$ : Blue fowl (Bb)
Selfing of F $_{1}$ - Bb x Bb
F $_{2}$ : BB (Black), Bb (Blue), Bb (Blue) and bb (White)
Ratio is 1:2:1
Thus, the correct answer is option C.

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A blue fowl was obtained after crossing between a white and black fowl. Then the ratio of their F2 generation will be

A blue fowl was obtained after crossing between a white and black fowl. Then the ratio of their $F_{2}$ generation will be