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Significance of Crossing Over

State the exp...

Question

State the expected ratio of the genotypes BB and Bb in the $F_{2}$ progeny.

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Solution

So expected ratio of genotypes BB - 1/4 (25%) and Bb - 2/4 (50%) in F2 generation.

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Similar questions

A blue colour flower plant denoted by BB is crossbred with that of white colour flower plant denoted by bb.

(a) State the colour of flower you would expect in their $F_{1}$ generation plants.

(b) What must be the percentage of white flower plants in $F_{2}$ generation if flowers of $F_{1}$ plants are self-pollinated?

(c) State the expected ratio of the genotypes BB and Bb in the $F_{2}$ progeny.

Q. The following crosses were performed between parental lines with indicated genotypes.
(i)

B B \times B b

A A b b \times a a B B

B B \times b b

B b \times B b

A A \times A A

b b \times B b

The above crosses that are expected to produce only

50

% homozygotes among the F

_{1}

Q. A pea plant with blue color flower BB is cross-breed with a pea plant with white flower denoted by ww.
State the expected ratio of the genotype BB and Bw in the F

_{2}

Q. The offspring of AA bb

\times

aa BB is crossed with, aabb. The genotypic ratio of progeny will be

Q. A pea plant with blue color flower by

B B

is cross-bred with a pea plant with white flower denoted by

w w

.
a) What is the expected color of the flowers in their F

_{1}

b) What will be the percentage of plants bearing white flower in F

_{2}

generation, when the flowers of F

_{1}

plants were selfed?

c) State the expected ratio of the genotype

B B

B w

_{2}

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Significance of Crossing Over

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