Page 72 - Biology - XII

VIVA VOCE

Q1. What does emasculation confi rm?
Ans. It confi rms prevention of self-pollination in emasculated fl owers.

Q2. Why is bagging done?
Ans. Bagging is done for isolating the emasculated fl ower.

Q3. What is hybridisation?
Ans. The process of mating individuals of diff erent genotype is called hybridisation.
Q4. What is pollination?
Ans. Pollination is the process of transfer of pollen grains from anthers to stigma of a fl ower.

Q5. What is emasculation?
Ans. Removal of anthers from the female fl ower before it opens is called emasculation.

COMPETENCY BASED QUESTIONS

Multiple Choice Questions

Q1. Selection of a particular variety/type of plant among the population is called
(a) rejection (b) cross-pollination
(c) germplasm (d) selection

Q2. Populations of cross-pollinated crops are
(a) homozygous (b) heterozygous

(c) genotypes (d) seed
Q3. Variation is
(a) a type of gene
(b) diff erence among individuals

(c) both (a) and (b) and it is among the individuals of a population
(d) heredity

Q4. Pure line of a plant type is a
(a) product of self-pollinated progeny (b) homozygous plant
(c) both (a) and (b) (d) None of these

Q5. Heritable variation is
(a) due to genotype (b) useful for selection
(c) genetic variation (d) all of these

Answer key

1. (d), 2. (b), 3. (c), 4. (c), 5. (d)

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