CBSE Class 12 Biology Previous Year Question Paper 2012 - Animal Husbandry
This document presents the CBSE Class 12 Biology Previous Year Question Paper for Animal Husbandry from the 2012 examination. It includes questions carrying 1 and 2 marks, covering topics such as improving milk yield through genetic approaches like out-crossing, identifying common bee species for apiculture (Apis indica), improved chicken breeds (Leghorn), and the strategy of inbreeding to increase homozygosity in cattle. The paper also delves into the disadvantages and importance of inbreeding, differentiating between out-crossing and cross-breeding, and explaining advanced reproductive technologies like MOET (Multiple Ovulation Embryo Transfer) for increasing herd size. Solving this board question paper is crucial for students to understand the exam pattern, types of questions asked, and to enhance their preparation for the CBSE board exams.
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Quick info
| Board | CBSE |
|---|---|
| Class | 12 |
| Subject | Biology |
| Session | 2012 |
| Language | English |
| Type | Previous Year Question Paper |
| Exam type | Board Exam |
Paper pattern
The paper includes questions carrying 1 and 2 marks, with some questions requiring differentiation and explanation of technologies.
Topics covered
Paper topics
- Animal Husbandry
- Apiculture
- Cattle Breeding
- Inbreeding
- Out-crossing
- Cross-breeding
- MOET
- Genetics
- Milk Yield
- Bee Species
- Chicken Breeds
Important topics
- Improving milk yield
- Apiculture species
- Improved chicken breeds
- Inbreeding strategy and effects
- Out-crossing vs Cross-breeding
- MOET technology
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Question paper text
Animal Husbandry
1 Mark Questions
- Write a professional approach at genetic level that can help the farmer to improve the milk
yield of low milk producing cows in his farm.
[Delhi 2013C]
Ans. Out-crossing is the professional approach which will help the farmer to improve milk yield of low milk producing cows.
- Write the name of the following
(i)The most common species of bees suitable for apiculture.
- An improved breed of chicken. [All India 2012]
Ans. (i) Apis indica is the most common species of bees for apiculture.
- Leghorn is an improved chicken breed.
- Which one of the following is used in apiculture Hilsa, Apis indica, Sonalika? [Foreign 2009]
Ans. Apis indica.
- Mention the strategy used to increase homozygosity in cattle for desired traits. [All India 2009]
Ans. Inbreeding is the strategy used to increase homozygosity. It refers to mating of more closely related individuals of the same breed for 4-6 generations.
- List any two economically important products for human obtained from Apis indica. [Delhi 2008]
Ans. Honey and beewax are two economically important products obtained from Apis indica.
2 Marks Questions
State the disadvantage of inbreeding among cattle. How it can be overcome? [Delhi 2014] Ans. Continued inbreeding among cattles reduces their fertility as well as productivity, resulting in inbreeding depression. It can be overcome by a single outcross, done by mating of cattle within the same breed, having no common ancestors of their pedigree upto 4-6 generations.
7. Explain the importance of inbreeding in cattle. [2014c]
Ans. The importance of inbreeding in cattle are:
- It increases homozygosity and evolve a pureline.
- Accumulation of superior genes and elimination of less desirable genes by selection.
8. Differentiate between out-crossing and cross-breeding. [2014c]
Ans. Differentiate between out-crossing and cross-breeding.
Out-crossing Out-breeding
This refers to the In this method mating of animals superior males of one
within the same breed, breed are mated with
but having no common superior females of
ancestors on either another breed. side of their pedigree up to 4-6 generation. Helps to overcome Develop new stable
inbreeding depression. superior breeds.
- Study the flow chart given below:
Cow is administrated with FSH hormone
'A'
6-8 eggs per cycle are derived
Artificially inseminated
Fertilised eggs at 8-32 cells are recovered
'B' Identify the events that take place at stages A'and 'B',
State the importance of the technology explained above.
[Foreign 2011]
Ans. (i) (A) The hormone induces follicular maturation and superovulation, i.e. production of 6- 8 eggs per cycle.
- Fertilised eggs are recovered and are transferred to surrogate mother.
- The technology is called MOET that is used to increase the herd size by mating high milk
Frequently asked questions
What is this document?
This is a CBSE Class 12 Biology Previous Year Question Paper for the Animal Husbandry section, specifically from the 2012 board examination.
What topics are covered in this paper?
The paper covers topics like animal breeding strategies (inbreeding, out-crossing, cross-breeding), apiculture, poultry farming, and reproductive technologies like MOET.
How can solving this previous year paper help students?
Solving this previous year question paper helps students understand the exam pattern, question types, marking scheme, and improve their score in the CBSE Class 12 Biology board exam.
What is the marking scheme for this paper?
The paper contains questions with marks allocated as 1 mark and 2 marks, as indicated in the question text.
What is the importance of Animal Husbandry in Class 12 Biology?
Animal Husbandry is important as it deals with the care, breeding, and management of livestock and poultry, contributing significantly to agriculture and food production, and is a key topic in the CBSE syllabus.
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