Genetic Drift

Q. Hardy-Weinberg principle is stated using which type of equation?

1. Algebraic equation
2. Geometric equation
3. Arithmetic equation
4. None of the above

Q. Which one of the following is incorrect about genetic drift?

1. Founder effect is a special case
2. Random change occurs in allelic frequency in a population
3. A mechanism for the evolution of new species
4. Significant only in large population

Q.

Explain Founder Effect?

Q. All of the following are important factors affecting the Hardy-Weinberg equilibrium, except __________.

1. migration
2. mating patterns
3. temperature
4. population size

Q. Founder effect is concerned with

1. Gene migration
2. Genetic drift
3. Gene flow
4. None of the above

Q. Which of the following is an example of genetic drift?

1. Individuals from one population migrate and interbreed with members of a different population
2. An allele increases in frequency due to the increase in fitness it provides to the organism.
3. A massive storm randomly kills many individuals in a population, changing the frequency of alleles in that population.
4. Both a and b

Q. Genetic drift operates in :

1. Slow reproductive population.
2. Small isolated population
3. Large isolated population
4. Non reproductive population.

Q. The concept of genetic drift was introduced by

1. Godfrey Harold Hardy
2. Sewall Wright
3. Wilhelm Weinberg
4. Hugo De Vries

Q. Founder effect is concerned with

1. Gene migration
2. Genetic drift
3. Gene flow
4. None of the above

Q. What are the different ways in which individuals with a particular trait may increase in a population?

Q. What is meant by genetic drift? Explain genetic drift citing the example of founder effect.

Q. Match the following.

List-I	List-II
(A) Founder effect	(I) Long necked giraffes
(B) Bottleneck effect	(II) Heterozygous for sickle cell anaemia
(C) Genetic load	(Ill) Pitcairn Island human population
(D) Directional selection	(IV) Polydactylic dwarf individuals
	(V) Sunflower population in california

1. A- (II), B- (I), C- (III), D- (IV)
2. A- (V), B- (IV), C- (II), D- (III)
3. A- (III), B- (IV), C- (II), D- (I)
4. A- (IV), B- (II), C- (V), D- (III)

Q.

How is gene flow different from a mutation?

Q.

Is gene flow required for natural selection?

Q. Which of the following is an example of genetic drift?

1. Individuals from one population migrate and interbreed with members of a different population
2. An allele increases in frequency due to the increase in fitness it provides to the organism.
3. A massive storm randomly kills many individuals in a population, changing the frequency of alleles in that population.
4. Both a and b

Q. What is meant by genetic drift?

Q. Assume that there are 12 mice living on an island. Now, there is a flood because of which most of the mice population is wiped out, and only 4 mice survive. This results in a sharp lowering of the population's gene pool. Such a phenomenon is known as

1. Genetic drift
2. Founder effect
3. Gene flow
4. Bottleneck effect

Q. What is genetic drift?

Q.

what is genetic variability ?

Q. Founders effect and bottleneck effect helps us to understand

1. gene migration
2. genetic drift
3. natural selection
4. mutation

Q. If interference is complete or 100 percent, then the frequency of the observed double crossover will be

1. Equal to expected frequency
2. Greater than expected frequency
3. Lesser than expected frequency
4. Zero

Q. In a random mating population in equilibrium, which of the following brings about a change in gene frequency in a non-directional manner :

1. Mutations
2. Random drift
3. Selection
4. Migration

Q. Read the following statements and select the correct option.
A. Increase in melanised moths after industrialisation in Great Britain is a proof for natural selection.
B. When more individuals of a population acquire a mean character value, it is called disruption.
C. Changes in allelic frequency in a population will lead to Hardy-weinberg equilibrium.
D. Genetic drift changes the existing gene or allelic frequency in future generations.

1. B alone is correct.
2. D alone is correct.
3. A and D alone are correct.
4. B and D alone are correct.

Q. Random genetic drift in a population probably results from :

1. Highly genetically variable individuals.
2. Interbreeding within small population.
3. Large population size.
4. Constant law mutation rate.

Q. Founder effect is concerned with

1. Gene migration
2. Genetic drift
3. Gene flow
4. None of the above

Q. Define founder effect. Give one example.

Q. Genetic drift operates only in population which is

1. In island
2. Smaller
3. Mendelian
4. Larger

Q. The isolated populations where genetic drift is more pronounced are _______ .

1. Large populations
2. Only plant populations
3. Only viral populations
4. Small populations

Q.

what is genetic drift?how does it produce founder effect?

Q. Frequency of an allele in an isolated population may change due to

1. Genetic drift
2. Gene flow
3. All of the above
4. Mutation