Which one of the following is the phenotypic monohybrid ratio in F₂ generation?

1. 3 : 1
2. 1 : 2 : 1
3. 2 : 2
4. 1 : 3

If a pure tall plant is crossed with a pure dwarf plant, then offspring will be

1. all tall
2. all dwarf
3. 3 tall 1 dwarf
4. 50% tall 50% dwarf

A plant with green pods and smooth seeds with genotype Ggss will give rise to the following gametes:

1. Gg and Ss
2. Gs and ss
3. Gs and gs
4. Gg and gs

The disease colour blindness is a :

1. Recessive X-linked disease
2. Dominant Y-linked disease
3. Recessive Y-linked disease
4. Dominant X-linked disease