Somaclones are produced by

1. Micropropagation.

2. Mutation.

3. Polyploidy.

4. Hybridisation.

Read the following statement and select the right choice

a. Semi-dwarf varieties, Jaya and Ratna were developed in IRRI, Phillippines.
b. Classical plant breeding involves crossing or hybridization of pure lines.
c. Saccharum barberi was originally grown in South India.
d. Genetic variability is the root of any breeding programme.

1. Only a is correct.

2. b and d are correct.

3. a, b and c are correct.

4. b, c and d are correct.

In maize, which of the following leads to resistance to maize stem borers?

1.  High aspartic acid and low sugar content.

2.  Solid stem and smooth leaves.

3.  Nectarless flowers.

4.  Solid stem and high sugar contents.

Genetically identical plants produced by micropropagation are called

1.  Explants

2.  Somaclones

3.  Somatic hybrids

4.  Cybrids

Study the following statements find the incorrect match.

1. Wild relatives are used in plant breeding.

2. Production of single cell protein is useful in reducing environmental pollution.

3. Somaclones are different from source of explant.

4. Maize hybrid have twice amount of amino acid lysine & tryptophan.

Identify the incorrect statement:

1.  Inbreeding is necessary if we want to evolve a pure line in any animal

2.  A single out-cross often helps to overcome inbreeding depression

3.  To induce super-ovulation in MOET, the cow is administered hormone with FSH like activity

4.  The genetic mother is used to transfer the fertilized eggs in MOET procedures

“Pusa Swarnim” is a/an

1. Aphid resistant variety of Brassica. 

2. White rust resistant variety of Brassica. 

3. Shoot and fruit borer resistant variety of flat bean.

4.  Hill bunt resistant variety of wheat.

In mung bean, resistance to yellow mosaic virus is induced by

1. Mutation breeding 

2.Hybridisation

3. Selection 

4. Polyploid breeding

Consider the following method of breeding in animals:
I. Matings take place between same breed
II. No common ancestor is present on either side for 4 – 6 generations
III. It is the best method to improve milk production in cattle

This method of breeding is called:

1. Inter-specific hybridization

2. Cross-breeding

3. Inbreeding

4. Out-crossing

The practice of mating of animals within the same breed, but having no common ancestors on either side of their pedigree up to 4 – 6 generations, is called:

1. Inbreeding

2. Out crossing

3. Cross breeding

4. Inter-specific hybridization