Home
Class 12
BIOLOGY
Which genetic mechanism prevent the self...

Which genetic mechanism prevent the self-pollination

A

Dichogamy

B

Self-incompatibility

C

Heterostyly

D

Homogamy

Text Solution

Verified by Experts

The correct Answer is:
B
Promotional Banner

Similar Questions

Explore conceptually related problems

Assertion : Self-incompatibility is a genetic mechanism which prevents self-pollination and thereby fertilisation by inhibiting either pollen germination or pollen tube growth in the pistil. Reason : In gametophytic self-incompatibility, the incompatibility reaction is determined by the genotype of the sporophytic tissue of the plant from which the pollen is derived.

A mechanism to prevent cross pollination is

Device for self - pollination is :

Given below are five statements (i-v) regarding constrivances to ensure cross - pollination is plants (i) Dicliny - Anthers stigmas mature at different times in a bisexual flower. (ii) Dichogamy - Flowers are unisexual. (iii) Prepotency - Pollen grains of the same flower germinate more rapidly over the stigma than the pollen grains another flower. (iv) Heterostyly - Two or three types of flowers with different heights of styles. (v) Herkogamy - A mechanical device to prevent self - pollination which of the above statement are correct ?

Assertion :- Non synchronised pollen release and stigma receptivity is of evolutionary significance. Reason :- It prevent self pollination and promote more genetic variability

What is pre-requisite for self pollination

Contrivance for self pollination is

Presence of mechanical barrier between stamen and carpel which prevents self pollination , is known as :

(a) Mention any four strategies adopted by flowering plants to prevent self- pollination. (b) Why is geitonogamy also referred to as genetical autogamy?

(a) Mention any four strategies adopted by flowering plants to prevent self- pollination. (b) Why is geitonogamy also referred to as genetical autogamy?