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Strategies for Enhancement in Food Production MCQs

Class XII Biology NCERT Based NEET Practice

📘 Concept Based 📝 Exam Level 🤖 AI Explanations
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100 questions in this chapter
Question 11 of 100
📘 CLASS XII
Examine the following statements regarding cross-breeding and its application:

I. Cross-breeding allows the desirable qualities of two different breeds to be combined.
II. The progeny hybrid animals obtained from cross-breeding can never be used for commercial production.
III. Hisardale is a new breed of sheep developed in Punjab.
IV. Hisardale was developed by crossing Bikaneri rams and Marino ewes.

Choose the option representing correct statements:
Explanation: Cross-breeding combines desirable traits of two breeds and the hybrids may be used for commercial production. Hisardale was developed in Punjab by crossing Bikaneri ewes with Marino rams. Hence Statements II and IV are incorrect.
Question 12 of 100
📘 CLASS XII
Evaluate the following statements regarding interspecific hybridisation:

I. It involves mating animals of two completely unrelated families.
II. The progeny of such crosses may combine desirable features of both parents.
III. The progeny can be of considerable economic value.
IV. A mule is a well-known example of interspecific hybridisation.

Select the correct statements:
Explanation: Interspecific hybridisation involves two related species, not unrelated families. The offspring may combine desirable traits and possess economic importance. Mule is a classic example.
Question 13 of 100
📘 CLASS XII
Read the statements below regarding Artificial Insemination (AI) in animal breeding:

I. Semen is collected from the chosen male parent and injected into the reproductive tract of the selected female by the breeder.
II. Collected semen must be used immediately and cannot be stored or frozen.
III. Semen can be transported in a frozen form to where the female is housed.
IV. Artificial insemination helps us overcome several problems of normal matings.

Which of the statements are correct?
Explanation: Semen can be collected, frozen, stored, and transported before insemination. Artificial insemination overcomes many limitations of natural mating. Therefore Statement II is incorrect.
Question 14 of 100
📘 CLASS XII
In the MOET program for herd improvement, hormones administered to the cow have:

I. LH-like activity to induce superovulation.
II. FSH-like activity to induce follicular maturation.
III. FSH-like activity to induce superovulation.
IV. Progesterone-like activity to prevent ovulation.

Choose the correct statement combination:
Explanation: In MOET, hormones with FSH-like activity are administered to induce follicular maturation and superovulation. LH-like or progesterone-like hormones are not used for this purpose.
Question 15 of 100
📘 CLASS XII
Regarding the eggs and embryo handling in MOET, which of the following statements are correct?

I. Under MOET, a cow produces 6–8 eggs per cycle instead of the normal single egg.
II. The superovulated animal is either mated with an elite bull or artificially inseminated.
III. Fertilised eggs at the 2–4 cell stages are recovered and transferred to surrogate mothers.
IV. Eggs are recovered surgically to avoid damaging the uterus of the genetic mother.

Select the correct option:
Explanation: MOET induces superovulation, producing 6–8 eggs per cycle. The animal is mated or artificially inseminated. Embryos are recovered non-surgically at the 8–32 cell stage, making Statements III and IV incorrect.
Question 16 of 100
📘 CLASS XII
Analyze the role of genetic and surrogate mothers in MOET:

I. The genetic mother is carried to term with the superovulated embryos.
II. Once embryos are transferred to surrogate mothers, the genetic mother is immediately available for another round of superovulation.
III. Surrogate mothers are genetically identical to the genetic mother.
IV. This technology has been successfully demonstrated in cattle, sheep, rabbits, buffaloes, and mares.

Which of the statements given above are correct?
Explanation: The embryos are transferred to surrogate mothers, so the genetic mother does not carry them to term and becomes available for another round of superovulation. Surrogate mothers are recipient females and are not genetically identical to the genetic mother. This technology has been successfully demonstrated in cattle, sheep, rabbits, buffaloes, mares, etc.
Question 17 of 100
📘 CLASS XII
Which of the following achievements or features are associated with the MOET technology?

I. It is used to decrease the herd size to focus only on high-performing individuals.
II. It has been used to breed high milk-yielding breeds of females.
III. It has been used to breed high-quality bulls yielding lean meat with less lipid.
IV. It helps to increase the herd size in a short time.

Choose the correct option:
Explanation: MOET is used to increase herd size in a short time. It has been successfully used to breed high milk-yielding females and high-quality bulls yielding lean meat with less lipid. Statement I is incorrect because MOET increases, rather than decreases, herd size.
Question 18 of 100
📘 CLASS XII
Match the breeding methods and their key features described below:

I. Mating of closely related individuals within the same breed for 4-6 generations is Inbreeding.
II. Mating within the same breed having no common ancestors on either side of pedigree up to 4-6 generations is Cross-breeding.
III. Mating of animals of different species is Interspecific Hybridisation.
IV. Mating of superior males of one breed with superior females of another breed is Out-crossing.

Which of the statements represent correct matching?
Explanation: Statement I correctly defines inbreeding. Statement III correctly defines interspecific hybridisation. Statement II actually describes out-crossing, whereas Statement IV describes cross-breeding.
Question 19 of 100
📘 CLASS XII
Evaluate these statements concerning pureline selection in cattle:

I. Cattle purelines are developed using heterozygous cross-mating strategies.
II. The development of cattle purelines relies on increasing homozygosity through inbreeding.
III. Superior traits are selected at each step, which increases the productivity of the inbred population.
IV. Unlike peas, cattle breeding cannot utilize selection to eliminate less desirable genes.

Choose the correct option:
Explanation: Developing purelines in cattle depends on increasing homozygosity through inbreeding, similar to Mendel's purelines in peas. Selection at each generation accumulates superior genes and eliminates less desirable genes, improving productivity. Therefore, Statements I and IV are incorrect.
Question 20 of 100
📘 CLASS XII
What are the characteristic features of inbreeding depression?

I. It is caused by continued close inbreeding.
II. It results in a significant increase in homozygosity.
III. It leads to reduced fertility and even reduced productivity.
IV. It can be resolved by a single outcross with an unrelated superior animal of the same breed.

Identify the correct set of statements:
Explanation: Continued close inbreeding increases homozygosity and results in inbreeding depression, reducing fertility and productivity. A single outcross with an unrelated superior animal of the same breed effectively restores fertility and yield.