Identify the conditions which prevent autogamy : (A) Presence of male or female flowers on different plants (B) Self incompatibility (C) Unsynchronised pollen release and stigma receptivity (D) Geitonogamy Choose the correct answer from the options given below : (
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Shift 28/05/2023 8:30 AM - 10:30 AM
A
(A), (B) and (D) only
B
(A), (B) and (C) only
C
(A), (B), (C) and (D) only
D
(B), (C) and (D) only
Correct Answer
(A), (B) and (C) only
Detailed Explanation
Outbreeding devices are as follows :-
- Unisexuality: In this case, the plant bears either male or female flowers and is not hermaphrodite.
- Dichogamy: In this mechanism, the stigma and anther mature at different times.
- Self- Incompatibility: In this condition, there is a gene that recognizes the similar gene and does not allow the pollen grain to germinate. This is due to the self-sterile gene present in the ovule and the grain.
- Heterostyly: In some plants, the stigma and the anthers are placed at different levels. This prevents the pollen from reaching the stigma and pollinating it.
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