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

What does the following equation represent? Explain:

p2 + 2pq + q2 = 1.


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. 


How does the Hardy-Wienberg equation explain genetic equilibrium?


(p + q)2 = p2 + 2pq + q2 = 1 represents an equation used in ______. 


The factor that leads to the Founder effect in a population is ______


Which type of selection explains industrial melanism observed in moth, Biston bitularia?


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?


Enumerate three most characteristic criteria for designating a Mendelian population.


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?


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


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 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.


Share
Notifications

Englishहिंदीमराठी


      Forgot password?
Use app×