Criteria for Autogamy to Take Place

Q.

Which of the following is not a criteria for autogamy to occur?

1. Flowers must be bisexual.

2. Flowers require synchrony in pollen release and stigma receptivity.

3. Anthers and stigma should lie close to each other.

4. Flowers should exhibit heterostyly.

Q. What are the disadvantages of cross pollination?
[3 Marks]

Q. A true breeding plant producing red flowers is crossed with a pure plant producing white flowers. Allele for red colour of flower is dominant. After selfing the plants of first filial generation, the proportion of plants producing white flowers in the progeny would be

1. $\frac{3}{4}$
2. $\frac{1}{3}$
3. $\frac{1}{2}$
4. $\frac{1}{4}$

Q. Choose the correct answer from the four alternatives given in the brackets:
In sexual reproduction of flowering plants, the first event involved in this is
(Fertilization, Germination, Regeneration, Pollination)

Q. A true breeding plant producing red flower is crossed with a pure plant producing a white flower. Allele responsible for red colour of the flower is dominant. After selfing the plants of first filial generation, the proportion of plants producing white flower in the progeny would be ?

1. $\frac{3}{4}$
2. $\frac{1}{4}$
3. $\frac{1}{3}$
4. $\frac{1}{2}$