Animal Breeding

Q. Hisardale is a new breed of sheep developed in Punjab, by crossing Bikaneri ewes and Marino rams. This is an example of:

1. Out - crossing

2. Line breeding

3. Cross- breeding

4. Close breeding

Q.

The branch of biology that deals with breeding, feeding and caring of animals is called ___ ___.

Q.

Rearing of animals on a large scale is known as?

Q.

Write two advantages of artificial insemination.

Q.

Outbreeding is an important strategy of animal husbandry because it?

1. Is useful in producing purelines of animals.

2. Helps in the accumulation of superior genes.

3. Exposes harmful recessive genes that are eliminated by selection.

4. Is useful in overcoming inbreeding depression.

Q.

The crossing of superior males of one breed with the superior females of another breed is ___ .

Q. Phenomenon in which hybrids acquire the superior characteristics of both the parents is known as

1. Heterosis
2. Hybrid vigour
3. Inbreeding
4. Superiority

Q.

How did Hershey and Chase label phage DNA?

Q.

What has the white revolution led to?

Q.

Artificial insemination means-

1. introduction of sperms of a healthy donor directly into the ovary

2. artificial introduction of sperms of a healthy donor into the vagina

3. transfer of sperms of husband to a test tube containing ova

4. transfer of sperms of a healthy donor to a test tube containing ova

Q. Phenomenon in which hybrids acquire the superior characteristics of both the parents is known as

1. Heterosis
2. Hybrid vigour
3. Inbreeding
4. Superiority

Q.

What is parturition in cattle?

Q.

Blue eye colour in human is recessive to brown eye colour. The expected children of a blue-eyed woman and a brown-eyed man who had a blue-eyed mother is likely to be in the ratio of:

1. All blue-eyed

2. Three blue-eyed and one brown-eyed

3. All brown-eyed

4. One blue-eyed and one brown-eyed

Q. Select the mismatch from the following.

1. Cotton – Hairy leaves – Resistance to aphids
2. Wheat – Solid stems – Resistance to stem sawfly
3. Cotton – Smooth leaves – Resistance to bollworms
4. Wheat – Hairy leaves – Resistance to cereal leaf beetle

Q. Crossing of unrelated pure breeds of animals with different traits within the same breed is called

1. Interspecific Hybridisation
2. Out crossing
3. Inbreeding
4. Cross breeding

Q. Continuous inbreeding leads to:

1. All of the above
2. Reduction in productivity
3. Reduced resistance to disease
4. Reduced fertility

Q. Artificial breeding is the only method to produce high yielding animals.

1. True
2. False

Q. Which of these is not an effect of hybrid vigour in animal breeding?

1. Yield of more eggs by poultry
2. Increased production of milk by cattle
3. Exposure of harmful recessive genes
4. Increased growth rate in domesticated animals

Q. Which of the following is not a part of Green Revolution?

1. Maize - Rich in lysine and tryptophan
2. Wheat - Used as donor for improving cultivated wheat
3. Rice - Recommended for anaemic patients
4. All of the above

Q. What effect will inbreeding tend to have on genotypic frequencies in a population?

1. It will increase the frequency of genotypes that produce a dominant phenotype
2. It will decrease the frequency of genotypes that produce a dominant phenotype
   
3. It will increase the frequency of homozygous genotypes
4. It will increase the frequency of heterozygous genotypes

Q. What effect will inbreeding tend to have on genotypic frequencies in a population?

1. It will increase the frequency of genotypes that produce a dominant phenotype
2. It will decrease the frequency of genotypes that produce a dominant phenotype
   
3. It will increase the frequency of homozygous genotypes
4. It will increase the frequency of heterozygous genotypes

Q. High yielding animals are mated to produce high yielding progeny.

1. False
2. True

Q. Outbreeding is an important strategy of animal husbandry because it :

1. Helps in accumulation of superior genes
2. Is useful in producing pure lines of animals
3. Is useful in overcoming inbreeding depression
4. Exposes harmful recessive genes that are eliminated by selection

Q. A cross between a male donkey and female horse produces a mule which is infertile.

1. True
2. False

Q. What effect will inbreeding tend to have on genotypic frequencies in a population?

1. Himagiri
2. TN-1
3. Pusa sadabahar
4. IR-8

Q. The cross between mule and hisardale indicates to which of the following breeding process?

1. Out breeding
2. Inbreeding
3. Artificial breeding
4. Natural breeding

Q. Choose the correct statement about animal breeding.

1. Selection of desirable traits in animals
2. Gives rise to superior progeny
3. All of the above
4. Leads to increased production of animal products

Q. Which of the following statements are incorrect regarding the following picture?

1. They belong to the species Canis lupus
2. They are interfertile
3. They belong to the same breed
4. Inbreeding leads to sterility in the offsprings

Q. Which of the following statements is false?

1. Breed is a specific group within a species having distinctive phenotype
2. Species is a group of naturally occurring organisms that can reproduce and have fertile offsprings
3. Breeds of the same species cannot look different.
4. One species will have multiple breeds.

Q. A rabbit breeder wishing to breed only black-haired rabbits wants to know if the black rabbit it has carries the recessive allele for white fur. Both of the rabbit's parents had black fur.
Which of the following methods would be the best method for the breeder to use in order to determine if the rabbit will produce pure-breeding black-haired offspring?

1. Cross-breed the rabbit back to its parents and see if any offspring have white fur.
2. Breed the rabbit with another rabbit with black fur and see if any of the offspring have white fur.
3. Cross-breed the rabbit with a rabbit that has white fur, if the offspring are all black, the rabbit is pure breeding for black fur.
4. Closely examine the rabbit's fur to see if there are any white hairs embedded within.
5. Examine the chromosomes from a hair cell from a black hair on the rabbit.