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प्रश्न
What is the Founder's effect?
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उत्तर
Sometimes the change in allele frequency is so different in the new sample of population that they become a different species. The original drifted population becomes founder and the effect is called founder effect.
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संबंधित प्रश्न
Give the graphical representation of Hardy· Weinberg's principle in the form of Punnet Square.
With the help of an algebraic equation, how did Hardy-Weinberg explain that in a given population the frequency of occurrence of alleles of a gene is supposed to remain the same through generations?
Differentiate between Directional natural selection and Disruptive natural selection.
How does the Hardy-Wienberg equation explain genetic equilibrium?
Multiple choice question.
In Hardy - Weinberg equation, the frequency of homozygous recessive individual is represented by:
Explain how mutations, natural selection and genetic drift affect Hardy Weinberg equilibrium.
In a population, Hardy Weinberg equilibrium is disturbed by following factors EXCEPT ______.
In the Hardy-Weinberg equilibrium equation, the homozygous mutant is represented as ______.
(p + q)2 = p2 + 2pq + q2 = 1 represents an equation used in ______.
Hardy Weinberg's principle explains ______
Disturbance of Hardy - Weinberg equilibrium results in
For the MN-blood group system, the frequencies of M and N alleles are 0.7 and 0.3, respectively. The expected frequency of MN-blood group bearing organisms is likely to be ______.
In a certain population, the frequency of three genotypes is as follows:
| Genotypes: | BB | Bb | bb |
| frequency: | 22% | 62% | 16% |
What is the likely frequency of B and b alleles?
Among the five factors that are known to affect Hardy-Weinberg equilibrium, three factors are gene flow, genetic drift and genetic recombination. What are the other two factors?
State and explain any three factors affecting allele frequency in populations.
Gene flow occurs through generations. and can occur across language barriers in humans. If we have a technique of measuring specific allele frequencies in different population of the world, can we not predict human migratory patterns in pre-history and history? Do you agree or disagree? Provide explanation to your answer.
“Migration may enhance or blurr the effects of selection”. Comment.
Name the law that states that the sum of allelic frequencies in a population remains constant. What are the five factors that influence these values?
How is Hardy-Weinberg's expression “(p2 + 2pq + q2) = 1” derived?
At a particular locus, the frequency of allele A is 0.8, and that of allele a is 0.2. What would be the frequency of heterozygotes in a random mating population at equilibrium?
The graphs below show three types of natural selection. The shaded areas marked with arrows show the individuals in the population who are not selected. The dotted vertical lines show the statistical means.
 |
 |
 |
| character Graph A |
character Graph B |
character Graph C |
- What names are given to the types of selection shown in graphs A, B and C?
- After the selection has operated for several generations in the above populations indicated as, Graph A, B and C, graphically illustrate the probable results.
Explain Hardy-Weinberg's principle
Write Hardy Weinberg's equation.
Give a mathematical expression for Hardy Weinberg's principle.
A population of 200 fruit flies is in Hardy Weinberg equilibrium. The frequency of the allele (a) 0.4. Calculate the following:
Frequency of the allele (A).
A population of 200 fruit flies is in Hardy Weinberg equilibrium. The frequency of the allele (a) 0.4. Calculate the following:
The number of carrier fruit flies.
