Evaluation and Selection of Parents

Q. Heterosis is:

1. Hybrid incompatibility
2. Hybrid vigor
3. Hybrid sterility
4. Structural hybridity

Q.

Name the methods employed in animal breeding. According to you which one of the methods is best? Why?

Q.

What is a true breeding line?

Q. Autogamy can occur in a chasmogamous flower if

1. Pollen matures before the maturity of ovule
2. Ovules mature before the maturity of pollen
3. Both pollen and ovule maturity is synchronous
4. Both anther and stigma and anther of same length

Q. Give 3 advantages of mutation breeding.

Q. Select the correct statement with respect to blending theory.

1. It was a theory of belief during the Post-Mendelian era.

2. It stated that characters of parents are discreet units that do not mix in an offspring.

3. Individuals inherit a smooth blend of traits from their parents.
4. Offsprings have traits exactly like their parents.

Q. Which of the following step is the pre-requisite of plant breeding programme?

1. Cross hybridisation
2. Germplasm collection
3. Selection of superior hybrids
4. Selection of parents

Q. In plant breeding experiments, pistillate flowers are not emasculated but are still bagged. Explain.

Q. Which one is a oil-yielding plant among the following?​

1. 
   Sunflower
2. 
   Lentil
3. 
   Cauliflower
4. Hibiscus

Q. In cross-breeding, _________ of one breed are mated with _________ of another breed.

1. Superior males, Normal females
2. Normal males, Superior females
3. Normal males, Normal females
4. Superior males, Superior females

Q. During hybridisation, we get a large number of progenies with mixed characters, but we choose only superior progeny by evaluation and selection.

1. True
2. False

Q. The Triticum aestivum wheat is

1. Haploid
2. Diploid
3. Tetraploid
4. Hexaploid

Q. Which one is an oil yielding plant among the following ?

1. lentil
2. sunflower
3. cauliflower
4. Hibiscus.

Q. Crop improvement is possible through

1. Judicious combination of selection, introduction and hybridisation
2. Selection
3. Scientific improvement of cultivated plants
4. Introduction

Q. During hybridisation, we get a large number of progenies with mixed characters, but we choose only superior progeny by evaluation and selection.

1. True
2. False

Q. Inheritance of roan coat in cattle is an example of

1. Incomplete dominance
2. Multiple allelism
3. Codominance
4. None of the above
   

Q. Hornless cattle is an example of

1. Germinal variation
2. None of the above
3. Somatic variation
4. Hybridization

Q. The biggest constraint of plant breeding is

1. availability of desirable gene in the crop and its wild relatives
2. infrastructure
3. trained manpower
4. transfer of genes from unrelated sources