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The Labrador retrievers coat colours are black, yellow, and chocolate. s produced by the presence of a recessive epistatic g
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Answer :

41.

Cross : GgBb X GgBB

Gg X Gg = GG, Gg, Gg, gg

Bb X BB = BB, BB, Bb, Bb

1/4 GG X 2/4 BB = 2/16 GGBB (black)

1/4 GG X 2/4 Bb = 2/16 GGBb (black)

2/4 Gg X 2/4 BB = 4/16 GgBB (black)

2/4 Gg X 2/4 Bb = 4/16 GgBb (black)

1/4 gg X 2/4 BB = 2/16 ggBB (yellow)

1/4 gg X 2/4 Bb = 2/16 ggBb (yellow)

So, Black (G_B_) coat colour,

= (2/16 + 2/16 + 4/16 + 4/16) X 100

= (12/16) X 100

= 75% (Answer).

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Cross : GGBb X GGBb

GG X GG = GG, GG, GG, GG

Bb X Bb = BB, Bb, Bb, bb

4/4 GG X 1/4 BB = 4/16 GGBB (black)

4/4 GG X 2/4 Bb = 8/16 GGBb (black)

4/4 GG X 1/4 bb = 4/16 GGbb (brown)

So, Black (G_B_) coat colour,

= (4/16 + 8/16) X 100

= (12/16) X 100

= 75% (Answer).

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