Outbreeding

Q.

Select the incorrect statement regarding inbreeding:

1. Inbreeding helps in the accumulation of superior genes and the elimination of undesirable genes

2. Inbreeding increases homozygosity

3. Inbreeding is essential to evolve pure lines in any animal

4. Inbreeding selects harmful recessive genes that reduce fertility and productivity

Q.

What are the methods of animal breeding? Which method is more advantageous and why?

Q.

Animal husbandry and plant breeding programs are examples of ___________.

Q. ‘Hisardale’ developed in Punjab by crossing Bikaneri ewes and Marino rams is a new breed of:

1. Sheep
2. Cattle
3. Goat
4. Chicken

Q. ‘Hisardale’ is a breed of sheep developed by crossing of -

1. Marino ewes and apennine rams
2. Deccani ewes and bikaneri rams
3. Bikaneri ewes and Marino rams
4. Marino ewes and bikaneri

Q.

Name the methods employed in animal breeding. According to you which of the methods is best? Why?

Q. Explain any three of the following practices in animal husbandry: [3]
a) Out-breeding
b) Out-crossing
c) Cross-breeding
d) Inbreeding

Q. By which method was a new breed ‘Hisardale’ of sheep formed by using Bikaneri ewes and Marino rams?

1. Mutational breeding
2. Cross breeding
3. Inbreeding
4. Out crossing

Q. Hisardale is a new breed of sheep developed in Punjab by crossing

1. Bikaneri rams and Marino ewes
2. Bikaneri ewes and Marino rams
3. Nali ewes and Deccani rams
4. Patanwadi rams and Nellore ewes

Q. State the following statements as True (T) or False (F).

I - Continuous inbreeding eventually leads to inbreeding depression.
II - Inbreeding always increases productivity.
III - Inbreeding helps to accumulate superior genes in a population.

1. I - F, II - T, III - F
2. I - T, II - T, III - F
3. I - T, II - F, III - T
4. I - F, II - F, III - T

Q. Arrange the given steps in correct sequence and select the correct answer.

Strategic steps for inbreeding are:
I. Identify superior male and superior female of the same breed.
II. These are then mated.
III. Evaluate the progeny obtained from the mating to identify superior males and females.
IV. In cattle, superior female is the cow or buffalo that produce more milk per lactation and superior male is the bull that gives rise to superior progenies.
V. Superior progenies obtained are further mated.

1. $I\to III\to II\to IV\to V$
2. $I\to II\to III\to IV\to V$
3. $III\to I\to II\to IV\to V$
4. $III\to II\to I\to V\to IV$

Q.

What do you mean by selective breeding ?

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

1. Out breeding
2. Inbreeding
3. Artificial breeding
4. None of the above

Q.

What does the level of breeding depend on?

Q. State the following statements as True (T) or False (F).

I - Continuous inbreeding eventually leads to inbreeding depression.
II - Inbreeding always increases productivity.
III - Inbreeding helps to accumulate superior genes in a population.

1. I - T, II - T, III - F
2. I - F, II - F, III - T
3. I - F, II - T, III - F
4. I - T, II - F, III - T

Q. Bombay green banana cultivation is the result of

1. Mass selection
2. Pure line selection
3. Clonal selection
4. Natural selection

Q. Application based question.
What is plant breeding? List the two steps the classical plant breeding involves.

Q. State the following statements as True (T) or False (F).

I - Continuous inbreeding eventually leads to inbreeding depression.
II - Inbreeding always increases productivity.
III - Inbreeding helps to accumulate superior genes in a population.

1. I - F, II - T, III - F
2. I - T, II - T, III - F
3. I - T, II - F, III - T
4. I - F, II - F, III - T

Q. Classical plant breeding involves______________

1. Crossing or hybridization of pure lines
2. Artificial selection to produce plants with desired qualities
3. Better yield, nutrition and resistance to disease
4. All of the above

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

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

Q. The technique involving collection of the semen from the desired male followed by injecting it into the reproductive tract of the selected female is called __________ .

1. animal breeding
2. artificial insemination
3. out-breeding
4. inbreeding

Q. The technique involving collection of the semen from the desired male followed by injecting it into the reproductive tract of the selected female is called __________ .

1. animal breeding
2. artificial insemination
3. out-breeding
4. inbreeding

Q. Match column I with column II and choose the correct option from given below.

Column I

Column II

A	Cross- breeding	1	Mule, a hybrid produced from male donkey and female horse
B	Outcross	2	Hisardale breed of sheep
C	Interspecific hybridization	3	Practice of breeding unrelated animals
D	Out-breeding	4	Practice of mating of animals within the same breed

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

Q. Mating of a superior male of a breed of a cattle to a superior female of another breed is called

1. Inbreeding
2. Outcrossing
3. Cross breeding
4. Outbreeding

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

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

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. Interspecific hybridization is the mating of

1. more closely related individuals within same breed for 4-6 generations
2. animals within same breed without having common ancestors
3. two different related species
4. superior males and females of different breeds

Q. State whether the given statement is true or false:
Human beings are not suitable breeding experiments to study the inheritance of human traits as in human beings controlled by the hybridization is not possible

1. True
2. False

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

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