Which of the following prevents inbreeding?

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(D) Inbreeding refers to the fertilization of a flower by pollen from the same plant or the same flower. To promote cross-pollination and increase gen

Vedclass · Accepted Answer

Self-incompatibility

Vedclass · Answer

(D) Inbreeding refers to the fertilization of a flower by pollen from the same plant or the same flower. To promote cross-pollination and increase genetic diversity,plants have evolved several 'outbreeding devices'. $1$. Self-incompatibility is a genetic mechanism that prevents self-pollen (from the same plant or flower) from fertilizing the ovules by inhibiting pollen germination or pollen tube growth in the pistil. $2$. Bisexual flowers and self-pollination actually promote inbreeding. $3$. Development of male and female flowers on the same plant (monoecious) prevents autogamy but not geitonogamy. Therefore,self-incompatibility is the most effective genetic mechanism to prevent inbreeding.

Column-$I$	Column-$II$
$i$. Protandry	$a$. Calotropis
$ii$. Prepotency	$b$. Tobacco
$iii$. Self sterility	$c$. Sunflower
$iv$. Herkogamy	$d$. Apple

Similar Questions

In which of the following are both autogamy and geitonogamy prevented?

The devices to discourage self-pollination are:

Continuous self-pollination in a species leads to:

Assertion $(A) -$ Flowering plants have developed many outbreeding devices to discourage self-pollination and to encourage cross-pollination.
Reason $(R) -$ Continued self-pollination results in inbreeding depression.

Match the following contrivances from Column-$I$ with their examples in Column-$II$.
Column-$I$ Column-$II$
$i$. Protandry $a$. Calotropis
$ii$. Prepotency $b$. Tobacco
$iii$. Self sterility $c$. Sunflower
$iv$. Herkogamy $d$. Apple

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