Emasculation and Bagging

Q.

What is meant by emasculation? When and why does a plant breeder employ this technique?

Q. Which of the following is not an outbreeding device used by the plants?

1. Unisexuality
2. Dichogamy
3. Heterostyly
4. Cleistogamy

Q. Which of the following is an outbreeding device?

a. If pollen release and stigma receptivity are not synchronized.

b. If the anther and stigma are placed at different positions so that pollen cannot come in contact with the stigma of the same flower.

c. Self-incompatibility which prevents self-pollen (from the same plant) from fertilizing the ovules by inhibiting pollen germination or pollen tube growth in the pistil.

d. Production of the unisexual flower.

1. $a,b$ and $c$
2. $b,c$ and $d$
3. $a,c$ and $d$
4. $a,b,c$ and $d$

Q. Which of the following options describes the correct steps in artificial hybridisation?

1. Bagging, emasculation, pollination, rebagging
2. Emasculation, bagging, pollination, rebagging
3. Emasculation, bagging, pollination
4. Emasculation, pollination, bagging

Q. Emasculation is not required when flowers are

1. bisexual
2. intersexual
3. unisexual
4. hermaphroditic

Q. Assertion (A): Emasculation is removal of male parts
Reason (R): Bagging is not required for emasculated flowers

1. A is true but R is false
2. Both A and R are false
3. Both A and R are true and R is the correct explanation of A
4. Both A and R are true and R is not the correct explanation of A

Q. Assertion: Emasculation and bagging are the crucial steps in artificial hybridisation.
Reason: It ensures that the flower is pollinated by pollen grains obtained from desirable varieties only.

1. Assertion and reason are true, and the reason is the correct explanation of the assertion
2. Assertion and reason are true, and the reason is not the correct explanation of the assertion
3. Assertion is true but the reason is false
4. Both assertion and reason are false

Q. Emasculation is the process of removal of

1. Anthers before dehiscence
2. Stigma
3. Pollen grains
4. Anthers after dehiscence

Q.

What is meant by emasculation? When and why does a plant breeder employ this technique?

Q.

Geeta planted papaya plants in her garden but the trees didnt bear any papayas. What do you think is the reason?

Q. Removal of anthers from a flower during hybridisation process is known as:

1. Isolation
2. Emasculation
3. Sterilisation
4. Crossing

Q.

What is bagging technique? How is it useful in a plant breeding programme?

Q. Emasculation is the process of removal of

1. Anthers before dehiscence
2. Stigma
3. Pollen grains
4. Anthers after dehiscence

Q.

What is bagging technique? How is it useful in a plant breeding programme?

Q.

What does emasculation mean?

Q. In the process of bagging, which of the following plant parts is covered?

1. Stigma
2. Anthers
3. Open flowers
4. Both A and B

Q. Regarding assertion and reason, choose the correct option
Assertion [A] : Emasculation and bagging are essential in artificial hybridisation
Reason [R] : Both the steps are essential to avoid contamination from unwanted pollen

1. A is true and R is false
2. Both A and R are true and R explains A
3. Both A and R are true but R does not explain A
4. Both A and R are false

Q. Creation of pure line has to be done in plant breeding at which step ?

1. After collection of germplasm
2. After selection of parents
3. After evaluation of parents
4. After cross hybridization

Q. In order to emasculate a plant having bisexual flowers, what do we remove with the help of forceps?

1. Style before dehiscence of anthers
2. Style after dehiscence of anthers
3. Anthers before their dehiscence
4. Anthers after their dehiscence

Q. Make a list of any three out breeding devices that flowering plants have developed and explain how they help to encourage cross-pollination?

Q. Which is true for emasculation?

1. Done in unisexual flowers to prevent cross-pollination
2. Done in bisexual flowers to prevent self-pollination
3. Done in staminate flower to prevent self-pollination
4. Done in pistillate flower to prevent self-pollination

Q. What is meant by emasculation? When and why does a plant breeder employ this technique?

Q. Emasculation is the process of removal of

1. Anthers before dehiscence
2. Stigma
3. Pollen grains
4. Anthers after dehiscence

Q. In emasculation, ______ part is removed.

1. Male
2. Female
3. Both A and B
4. None of the above

Q.

A plant breeder has two varieties of plants, one that produces larger fruits and the other that produces more number of fruits. He wants to ensure desired pollination among the flowers of these two varieties so as to make a plant with both the characteristics. Describe the procedure he would employ to ensure desired pollination, if the plants are:

1. Bisexual
2. Unisexual

[5 marks]

Q. Mixing up of the characters of two parents in the new off springs is known as

1. Micropropagation
2. Hybridization
3. Propagation
4. Emasculation

Q. Sterile flower.

Q.

What is meant by emasculation? When and why does a plant breeder employ this technique?

Q.
Identify the techniques represented in the images

1. Bagging and emasculation
2. Bagging and pollination
3. Harvesting and emasculation
4. Bagging and pollen collection

Q. Match the following:

1. A-4, B-1, C-2, D-3
2. A-2, B-3, C-4, D-1
3. A-1, B-2, C-3, D-4
4. A-3, B-4, C-1, D-2