Advertisements
Advertisements
प्रश्न
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?
Advertisements
उत्तर
Hardy-Weinberg's principle states that the sum of allelic frequencies in a population remains constant. Five factors are known to affect Hardy-Weinberg equilibrium. These are gene migration or gene flow, genetic drift, mutation, genetic recombination and natural selection.
APPEARS IN
संबंधित प्रश्न
p2 + 2pq + q2 = 1. Explain this algebraic equation on the basis of Hardy Weinberg's principle.
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?
State Hardy-Weinberg’s principle.
Differentiate between Directional natural selection and Disruptive natural selection.
What is the Founder's effect?
In a population, Hardy Weinberg equilibrium is disturbed by following factors EXCEPT ______.
The factor that leads to the Founder effect in a population is ______
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?
“Migration may enhance or blurr the effects of selection”. Comment.
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.
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 homozygous dominant fruit flies.
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 homozygous recessive fruit flies.
Which one of the following factors will not affect the Hardy-Weinberg equilibrium?
What does the Hardy-Weinberg equation \[p^2 + 2pq + q^2 = 1\] represent?
What is the role of natural selection in affecting Hardy-Weinberg equilibrium?
What does genetic drift cause in a population, particularly in new samples of a population?
How does gene migration or gene flow affect allele frequencies?
