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प्रश्न
“Migration may enhance or blurr the effects of selection”. Comment.
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उत्तर
Migration may cause enrichment of the gene pool of such alleles that are being selected for, or nullify the effects of selection through replenishment of alleles that were selected against by nature.
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संबंधित प्रश्न
p2 + 2pq + q2 = 1. Explain this algebraic equation on the basis of Hardy Weinberg's principle.
What is the Founder's effect?
According to the Hardy-Weinberg principle, the allele frequency of a population remains constant. How do you interpret the change of frequency of alleles in a population?
How does the Hardy-Wienberg equation explain genetic equilibrium?
How does Hardy-Weinberg’s expression (p2+2pq+q2=1) explain that genetic equilibrium is maintained in a population? List any four factors that can disturb the genetic equilibrium.
In a population, Hardy Weinberg equilibrium is disturbed by following factors EXCEPT ______.
Hardy - Weinberg equilibrium is known to be affected by gene - flow, genetic drift, mutation, genetic recombination and
The factor that leads to the Founder effect in a population is ______
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?
Enumerate three most characteristic criteria for designating a Mendelian population.
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:
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 carrier fruit flies.
Which one of the following factors will not affect the Hardy-Weinberg equilibrium?
What is the primary statement of Hardy-Weinberg's principle?
Where do a large proportion of recessive alleles exist in a population at Hardy-Weinberg equilibrium?
What evolutionary phenomenon occurs when a small portion of a population migrates to a new location and becomes founders of a distinct population?
How does gene migration or gene flow affect allele frequencies?
What biological significance does the heterozygous genotype hold in populations at Hardy-Weinberg equilibrium?
What does it indicate when the measured frequency of an allele differs from the expected Hardy-Weinberg value?
Which condition for Hardy-Weinberg equilibrium specifically eliminates random fluctuations in allele frequency?
