Genetics Animation

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Genetics Animation

• By Dale M. Forsyth

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If no dominance ¼
Shorthorn Red ½ Shorthorn
Rhone ¼ Shorthorn
White If blue is dominant (as black over red,
Angus) ¾ has one Angus black ¼ has
NO Angus red
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Another way to visualize
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Say B is black and is dominant to red (b) When 2
heterozygous animals are mated
B b B b
BB Black Bb Black bb Red
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Say B is black and is dominant to red (b) When 2
heterozygous animals are mated
B b B BB b
BB Black Bb Black Bb Red
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Say B is black and is dominant to red (b) When 2
heterozygous animals are mated
B b B BB Bb b
BB Black Bb Black Bb Red
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Say B is black and is dominant to red (b) When 2
heterozygous animals are mated
B b B BB Bb b Bb
BB Black Bb Black Bb Red
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Say B is black and is dominant to red (b) When 2
heterozygous animals are mated
B b B BB Bb b Bb bb
BB Black Bb Black Bb Red
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Say B is black and is dominant to red (b) When 2
heterozygous animals are mated
B b B BB Bb black black b Bb bb black
red
BB Black Bb Black bb Red
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A more complicated example with 2 traits White
(W) is dominant to black (w) and Smooth (S) is
dominant to rough (s)
For both the males and females, the following
kinds of gametes can be formed WS wS Ws
ss Genotypes White/Smooth black/smooth
white/rough black/rough
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When 2 heterozygotes are crossed, the following
results
Opps, not done yet
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• End of this portion

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