Genetics

Michelle BohananMarch 27, 2008

© Gil Repetto

© Gil Repetto

© M. Bohanan

© M. Bohanan

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

© Gil Repetto

Standard (+/+)

© M. Bohanan

Standard (+/+)

Single-Dose Veil (V/+)© M. Bohanan

© M. Bohanan

Standard (+/+)

Single-Dose Veil (V/+) Double-Dose Veil (V/V)

© M. Bohanan

© M. Bohanan

© M. Bohanan © M. Bohanan

Mutations – Dark Locus

Dark (D)

Marble (M)

Gold Marble (Gm)

New Gold (g)(may be unexpectedly dominant )

© Gil Repetto

Black Lace

Smokey Locus (Sm)

© Gil Repetto

Mutations

Chocolate Smokey Locus (Sm)

Pearlscale Locus (p)

Halfblack Locus (h)

Albino Locus (a)

© M. Bohanan

Mutations

Blushing (S/S)

Zebra (Z)

Stripeless (S)

Platinum Blue (~pb~)

© 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

© 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)