English
Karnataka Board PUCPUC Science 2nd PUC Class 12

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?

Advertisements
Advertisements

Question

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?

Short/Brief Note
Advertisements

Solution

Frequency of B allele = all of BB + ½ of Bb = 22 + 31 = 53%

frequency of b allele = all of bb + ½ of Bb = 16 + 31 = 47%

shaalaa.com
  Is there an error in this question or solution?
Chapter 7: Evolution - VERY SHORT ANSWER [Page 48]

APPEARS IN

NCERT Exemplar Biology Exemplar [English] Class 12
Chapter 7 Evolution
VERY SHORT ANSWER | Q 10. | Page 48

Video TutorialsVIEW ALL [1]

RELATED QUESTIONS

p2 + 2pq + q2 = 1. Explain this algebraic equation on the basis of Hardy Weinberg's principle.


What is the Founder's effect?


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.


Explain how mutations, natural selection and genetic drift affect Hardy Weinberg equilibrium.


In a population, Hardy Weinberg equilibrium is disturbed by following factors EXCEPT ______.


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?


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.


Enumerate three most characteristic criteria for designating a Mendelian population.


“Migration may enhance or blurr the effects of selection”. Comment.


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
  1. What names are given to the types of selection shown in graphs A, B and C?
  2. 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


State 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.


The black colour on the beak of finches dominates over the yellow colour. There are 210 individuals with the genotype DD, 245 individuals with the genotype Dd and 45 individuals with the genotype dd. Deduce the frequency of individuals with dominant, heterozygous, and recessive traits.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×