Selection and Testing of Superior Recombinants

Q.

What does a group of locusts called?

Q.

Who is the father of genetic engineering?

1. Steward Linn

2. Stanley Cohen

3. Paul Berg

4. Kary Mullis

Q. Geitonogamy is

1. Genetically autogamous
2. Ecologically autogamous
3. Genetically allogamous
4. Functionally autogamous

Q. Read the following statements related to Sonalika and Kalyan Sona. Select the correct option stating True (T) and False (F).

A. Sonalika and Kalyan Sona are semi-dwarf varieties of rice.
B. Sonalika and Kalyan Sona were developed at IRRI.
C. Sonalika and Kalyan Sona were introduced to India in 1963.
D. Sonalika and Kalyan Sona are high yielding and disease resistant.

1. A - T, B - F, C - T and D - F
2. A - F, B - F, C - T and D - T
3. A - T, B - F, C - F and D - F
4. A - F, B - T, C - F and D - T

Q. The longer the chromosomes of an organism, the more genetic variability it is supposed to get from which of the following processes?

1. Independent assortment
2. Linkage
3. Crossing over
4. Mutation

Q.

Read the following statements.

(i) Primers used in PCR are small chemically synthesised oligosaccharides.

(ii) E. coli is closely related to Salmonella.

(iii) There are 3 basic steps in genetically modifying an organism.

(iv) The techniques of the genetic engineering overcome the limitation of traditional hybridisation procedures

In these statements how many are correct?

1. 2
2. 3
3. 4
4. 1

Q. Regarding the assertion and reason, choose the correct option.
Assertion: Clonal selection is a method of breeding in sugarcane.
Reason: Sugarcane is propagated through suckers

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

Q. Bryophyllum reproduces vegetatively through _________.

1. Leaf
2. Root
3. Stem
4. Flower

Q. Write a short note on mass selection.

Q. Plant breeding involves techniques for manipulating plants in order to create the desired plant types. State the steps involved in the production of a new genetic variety of a crop.

Q. gc does not have its own reserve food material so from where does it get nourishment - from vc reserve food material or from any other source ??

Q. Tissue culture technique can produce indefinite number of new plants from a small parental tissue. The economic importance of technique is in raising

1. Homozygous diploid plants.
2. Development of new species.
3. Variants through picking up somaclonal variations.
4. Genetically uniform population of an elite species.

Q. Vegetative reproduction in Funaria takes place by

1. Gemmae
2. Primary protonema
3. Secondary protonema
4. All of the above

Q. Micropropagation is

1. Raising of plants from a small tissue in culture
2. Multiplication of small plants
3. Propagation of small parts of organisms
4. Indefinite maintenance of an organ or tissue

Q. M.S. Swaminathan Research Institute is located at

1. New Delhi
2. Mumbai
3. Lucknow
4. Chennai

Q. Progeny plants with superior characters are self - pollinated for several generations till they reach a state of heterozygosity
The incorrect term used in the above sentence is

1. Superior
2. Self - pollinated
3. Progeny plants
4. Heterozygosity

Q. Male sterility was discovered by

1. Bycott et al
2. Sonneborn
3. Rhoades
4. Correns

Q. In hybridisation the haploids combine the advantage of

1. Recombination
2. Segregation
3. Fixation
4. All

Q. Mendel selected Pisum sativum for hybridisation experiments because of:

1. Clear contrasting characters and short life span
2. Long life span and non-fertile hybrids
3. Presence of unisexual flowers
4. Infertile hybrids and production of large number of seeds by each plant

Q. Which one of the following methods is commonly used to maintain the genetic traits of a given plant?

1. By propagating through seed germination
2. By propagating through vegetative multiplication
3. By generating hybrids through intergeneric pollination
4. By treating the seeds with gamma radiations

Q. Regarding the assertion and reason, choose the correct option.
Assertion: Clonal selection is a method of breeding in sugarcane.
Reason: Sugarcane is propagated through suckers

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

Q. Find out correct statement:-

1. Clonal selection is applicable to cross pollinated crops
2. Inbreeding depression is gain of vigour due to inbreeding
3. Dr. M.S swaminathan is responsible for revolution in india.
4. Plant tissue culture technique is not based on totipotency

Q. Which one of the following crops was subjected the most to continuous selection and domestication by man?

1. Potato
2. Maize
3. Wheat
4. Rice

Q. Give one Give one example of each plant that reproduces by sucker bulb I rhizome runner offset leafbird and belleville Offspring derived a sexual reproduction are called as clones justify giving the reason

Q. To meet the demands of the society, in-vitro production of a large number of plantlets in a short duration is practiced in floriculture and horticulture industry today. This is called as

1. Somatic hybridization
2. Micropropagation
3. Hybridoma technology
4. None of the above