CBSE Class 12 Biology HOTs Strategies For Enhancement In food Production

CBSE Class XII HOTs Biology - Strategies For Enhancement Infood Production database with answers (Please refer to other links for answers to HOTs questions) for Class 12 of CBSE exams for CBSE Students. Based on CBSE and NCERT guidelines. The students should practice these Question Papers to gain perfection which will help him to get more marks in CBSE examination. 

Q.1. Why hybrids of selected parents are self pollinated till a state of homozygosity?1

Ans.1) Inbreeding depression


Q.2. Name the parents of hisardale. 1

Ans.2) It is free of virus

Q.3. For which amino acids maize is biofortified ? 1

Ans.3) Embryo Transfer technology

Q.4. To which micro organism is Parbhani Kranti resistant and give the botanical name of it ?1


Ans.4) Because there is limited availability of disease resistance genes in the crop plants & their wild relatives.

Q5. Which are the characters will you look for, to confirm that the plant given to you is a pest resistant?1

Ans.5)the best available local cultivar

Q.6. Why the breeding programme for millets is mainly focused for the development of high yielding varieties?


Ans.6) To produce pure or inbred lines, so that there will be no segregation of characters in the progeny.
Q.7. Name the parents of hisardale. 1
Ans.7). Bilkaneri ewes & Marino rams
Q.8. For which amino acids maize is biofortified ? 1

Ans.8). Tryptophan & lysine
Q.9. To which micro organism is Parbhani Kranti resistant and give the botanical name of it ?1

Ans.9). Yellow mosaic virus, Abelmoschus esculentus
Q.10. Which are the characters will you look for, to confirm that the plant given to you is a pest resistant?1
Ans.10). Morphological, physiological & biochemical
Q.11. Why the breeding programme for millets is mainly focused for the development of high yielding varieties? 1
Ans.11). Resistant to water stress.

2 Marks

Q.1)Name the pest organisms for which Pusa stem- 2 & pusa stem – 3 are prepared as pest resistant recombinants 2

Ans.1)Yellow mosaic virus, Abelmoschus esculentus

Q.2)The somatic hybrid of tomato & potato is ‘pomato’ but it is not grown on commercial scale. Why? 2

Ans.2) Morphological, physiological & biochemical


3) To which products are the following related? 2

a) Green revolution

b) Blue Revolution


Ans.3) a. Increased food production (Wheat & paddy)


         b. Increased fish production
Q.4) Complete the following missing steps and aims in the breeding of new genetic variety of a crop. 2

Step Aim

a.___________________ -collection of pre-existing genetic variability

B.Pure line creation -To evaluate and select parents.

c.____________________ -To combine the desired characters of different plants

d. screening the superior _________________________ combinant

e. Release and commercialization __________________________ of new cultivars


Ans.4) a. Germ plasm collection


b. Cross Hybridization


c. To select and test the hybrid for the desired character combination for success of breeding objective.


d. Obtained hybrid is evaluated in the crop field and is compared with the local crop cultivar.

Q.5) How is outcrossing different from cross breeding? 2


Ans.5) Outcrossing is the practice of mating animals of the same breed that have no common ancestors on either side of their pedigree upto 4-6 generations whereas cross breeding is the cross of one with superior females of another breed.

Q.6) How was Parbhani kranti created? 2


Ans.6) It was created by transferring gene for resistance to yellow mosaic virus(YMV) in bhindi from a wild species to (Abelmoschus esculentus.)

Q.7) Which of the following crop plants are not matching as correct pairs? 2

a. Wheat - Himgiri

b. Brassica- Pusa Gaurav

c. Cauliflower- Pusa Shubra

d. Chilli-Pusa swarnim

Ans.7) Pusa Gaurav and Pusa swarnim are mismatching pairs.

Q.8)Complete the following table


Ans.8) A)Himgiri           B)Brassica                  c)Pusa shubhra                D) Chilli E)Chilly mosaic & leaf cure
Q.1)."Artificial insemination helps overcome several problems of normal mating"- Justify the statement and list a few of them. 3
Ans.1) This statement is true
-it helps in selective breeding in animals.
-semen of a single bull can be used to impregnate several females.
-quality semen is available in preserved form all the time at all places- Frozen semen can be exported or imported. It is the most reliable method.
Q.2) Name the steps represented in the following process 3
Ans.2)A-Collection of variability
B-Cross hybridization among the selected parents.
C – Selection and testing of superior recombinants.
Q.3). Match A with B 
           A                                         B 
i) Turnip Mosaic                         a) Bacteria
ii) Citrus canker                          b) Virus
iii) Sugar cane red rot                 c) Fungi
Ans.3) i) b)
ii) a)
iii) c)
Q.4)Following are the steps for breeding process. Arrange them in correct order, name the process & state its advantages. 3
a. The female is mated with a male of good variety
b. The fertilized egg at 8-32 called stage are recovered & transferred to surrogate mother.
c. The female is administered hormones to induce super-ovulation.
Ans.4) Correct order – c)  a)  b)
Process-Multiple ovulation embryo transfer
Advantage – To increase herd size in short time.



Click to View or Download pdf file
Click for more Biology Study Material

Latest NCERT & CBSE News

Read the latest news and announcements from NCERT and CBSE below. Important updates relating to your studies which will help you to keep yourself updated with latest happenings in school level education. Keep yourself updated with all latest news and also read articles from teachers which will help you to improve your studies, increase motivation level and promote faster learning

CBSE Board Exams in July Press Release

CBSE has released press note for the dates for the CBSE Board exams for Class 10. CBSE said “With regards to conduct of Class X examinations several queries are being received by the CBSE. In this context, it is once again reiterated that remaining examinations of...

CBSE advisory on student marks

CBSE has issued a public advisory for all students to be careful from unscrupulous persons impersonating themselves as officers/officials of CBSE. These people have been contacting parents and have been telling them that they have access to student marks data for Board...

CBSE Boards Paper Checking to Start

As per the announcement recently released by the Ministry of Home Affairs, at least 3000 CBSE affiliated selected as evaluation centers for board exam answer sheets will be allowed to open for the limited purpose of evaluation purposes only. The answer sheets for Board...

Board Cancelled Official CBSE Statement

Keeping in view the requests received from various State Governments and the changed circumstances as on date, following has been decided- 1. Examinations for classes X and XII which were scheduled from 1st July to 15th, 2020 stand cancelled. 2. Assessment of the...

Art Integrated Project work for classes 1 to 10

CBSE Board has decided to introduce Art-Integrated Project work for classes I to X to promote Art-Integrated Learning in schools to make teaching learning Competency-Based and joyful. As part of this, at least one Art-Integrated Project in each subject shall be taken...

Class 10 Board Exams to be held

The CBSE board has announced that there is no change in the decision of conducting the CBSE board exams for the 29 subjects, which were canceled due to coronavirus crisis. So when the lockdown gets relaxed completely, the board will conduct the exams for the students,...

Studies Today