A blue colour flower plant denoted by BB is cross bred with a white colour flower plant denoted by bb. (3)
a. State the colour of flower, you would expect in the F1 progeny.
b. Give the percentage of plants bearing white flowers in F2 generation when the F1
plants are self-crossed.
c. Find out the ratio of genotype Bb: bb in the F2 generation with the help of cross.
Answers
Explanation:
(a) In the first generation i.e. in F, generation, all the flower plants will be of blue color. It can be shown as follows:
(b) When flowers of f1 generation are self pollinated:
So, in F2 generation, there will be three blue Flowers and one white flower. So they ratio of blue flower plant to ratio of white flower plant is 3:1 But we need to find the ration percentage of white flower which is calculated as follows:
Answer:
blue colour flower plant denoted by BB is crossbred with a white colour flower plant denoted by ww.
(a) State the colour of flower we would expectintheirF1 progeny.
(b)Write the percentage of plants bearing white flower inF2generation when the flowers ofF1 plants were selfed.
(c) State the expected ratio of the genotype BB and Bw intheF2progeny
Explanation:
ANSWER....
a) In the first generation i.e. in F, generation, all the flower plants will be of blue color. It can be shown as follows:
(b) When flowers of f1 generation are self pollinated:
So, in F2 generation, there will be three blue Flowers and one white flower. So they ratio of blue flower plant to ratio of white flower plant is 3:1 But we need to find the ration percentage of white flower which is calculated as follows:
So, in F2 generation, there will be three blue Flowers and one white flower. So they ratio of blue flower plant to ratio of white flower plant is 3:1 But we need to find the ration percentage of white flower which is calculated as follows:
So, Ratio percentage of white flower plant is 25% (c) The expected ratio of the genotypes BB and Bb in the F2 progeny is as follows: