10
A blue colour flower (BB) bearing plant is crossed with a plant with white coloured flowers (bb).
(a) State the colour of the flowers you would expect in their $\text{F}_1$ progeny.
(b) What must be the percentage of white flower plants in the $\text{F}_2$ generation, if the $\text{F}_1$ plants are self-pollinated ?
(c) State the expected ratio of genotypes BB and bb in $\text{F}_2$ progeny.
(a) State the colour of the flowers you would expect in their $\text{F}_1$ progeny.
(b) What must be the percentage of white flower plants in the $\text{F}_2$ generation, if the $\text{F}_1$ plants are self-pollinated ?
(c) State the expected ratio of genotypes BB and bb in $\text{F}_2$ progeny.
Show SolutionHide Solution↓
(a) All Blue flowers
(b) Parents: BB $\times$ bb
Gametes (B) (b)
F1 Bb (Blue)
Self Pollination Bb $\times$ Bb
Gametes (B), (b)
B BB Bb
b Bb bb
25% flowers are white
(Blue: White= 3:1, $\frac{1}{2} \times 100 = 25$)
(c) BB: bb :: 1: 1
(b) Parents: BB $\times$ bb
Gametes (B) (b)
F1 Bb (Blue)
Self Pollination Bb $\times$ Bb
Gametes (B), (b)
B BB Bb
b Bb bb
25% flowers are white
(Blue: White= 3:1, $\frac{1}{2} \times 100 = 25$)
(c) BB: bb :: 1: 1