हिंदी
कर्नाटक बोर्ड पी.यू.सी.पीयूसी विज्ञान 2nd PUC Class 12

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

Advertisements
Advertisements

प्रश्न

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

विकल्प

  • Stabilising

  • Directional

  • Disruptive

  • Artificial

MCQ
रिक्त स्थान भरें
Advertisements

उत्तर

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

Explanation:

During industrial pollution, dark-colored (melanic) moths had a selective advantage due to camouflage on soot-darkened trees, leading to an increase in their population. This directional change in phenotype frequency towards the darker form illustrates directional selection responding to environmental changes caused by industrialization.

shaalaa.com
  क्या इस प्रश्न या उत्तर में कोई त्रुटि है?
अध्याय 7: Evolution - MULTIPLE CHOICE QUESTIONS [पृष्ठ ४७]

APPEARS IN

एनसीईआरटी एक्झांप्लर Biology Exemplar [English] Class 12
अध्याय 7 Evolution
MULTIPLE CHOICE QUESTIONS | Q 13. | पृष्ठ ४७
नूतन Biology [English] Class 12 ISC
अध्याय 7 Evidences and Theories of Biological Evolution
TEST YOUR PROGRESS | Q 1. 105. | पृष्ठ ३४५

वीडियो ट्यूटोरियलVIEW ALL [1]

संबंधित प्रश्न

What does the following equation represent? Explain:

p2 + 2pq + q2 = 1.


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?


State Hardy-Weinberg’s principle.


Differentiate between Directional natural selection and Disruptive natural selection. 


What is the Founder's effect?


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:


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


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


Hardy Weinberg's principle explains ______


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?


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.


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?


List any two factors that can disturb the genetic 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.

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 recessive 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.


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×