Principles of Genetics and Breeding

Answers

1. Phenotypes of the parents : Pink x Pink

2. a) All red

b) Red : Pink ( 1 : 1 )

c) Black : Pink ( 1 : 1 )

d) Red : Pink : Black ( 1:2:1 )

3.The inheritance of scale pattern in goldfish is due to incompletely dominant gene action.

Genotypes of the parents : T¹T¹ x TT

Genotypes of the F₁ : All T¹T

Genotypes of the F₂ : T¹T¹ : T¹T : TT ( 1:2:1 )

4. a) All steel blue (VV)

b) Steel Blue : Blue ( VV : Vv, 1:1)

c) All blue ( Vv )

d) Steel blue : blue : green (VV : Vv : v v, 1:2:1)

e) Blue : Green (Vv : v v, 1:1)

f) All green (vv)

5. Genotypes of the parents

a) bo x bo

b) bb x ab

c) bb x ao

d) bo x ao

e) bo x ab

f) bb x oo

6. a) All Bronze

b) 1:2:1

c) Wild : Bronze (1:1)

d) Bronze : Gold (1:1)