genetics michelle bohanan march 27, 2008. © gil repetto
TRANSCRIPT
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Genetics
Michelle BohananMarch 27, 2008
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© Gil Repetto
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© Gil Repetto
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© M. Bohanan
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© M. Bohanan
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Uppercase symbols indicate the gene is dominant Dominant genes express a trait whether they
are homozygous or heterozygous Dominant genes sometimes show
incomplete dominance Lowercase symbols indicate the gene is
recessive Recessive genes express a trait only when
they are homozygous
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© Gil Repetto
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Standard (+/+)
© M. Bohanan
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Standard (+/+)
Single-Dose Veil (V/+)© M. Bohanan
© M. Bohanan
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Standard (+/+)
Single-Dose Veil (V/+) Double-Dose Veil (V/V)
© M. Bohanan
© M. Bohanan
© M. Bohanan © M. Bohanan
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Mutations – Dark Locus
Dark (D)
Marble (M)
Gold Marble (Gm)
New Gold (g)(may be unexpectedly dominant )
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© Gil Repetto
Black Lace
Smokey Locus (Sm)
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© Gil Repetto
Mutations
Chocolate Smokey Locus (Sm)
Pearlscale Locus (p)
Halfblack Locus (h)
Albino Locus (a)
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© M. Bohanan
Mutations
Blushing (S/S)
Zebra (Z)
Stripeless (S)
Platinum Blue (~pb~)
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© Rich & Judy Halas
Combinations ? What are the possible genetic combinations that would produce this phenotype?
Clown (Z/S) Ex. Zebra (Z)Stripeless (S)
Z + S = Z/S = Clown
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© Rich & Judy Halas
Combinations ? What are the possible genetic combinations that would produce this phenotype?
Clown (Z/S) Ex. Zebra (Z)Stripeless (S)
Z + S = Z/S = Clown
Albino pearlscalea/a- p/p
Albino Locus (a)a/aXPearlscale Locus (p) p/p
Black Clown(D/D - Z/S)