116 public questions tagged with this topic.
Genetic drift causes random changes in allele frequencies, especially in small populations. This follows from NCERT principle where the relation explains the outcome clearly for students in simple steps.
Ref: NCERT Biology Textbook for Class XI and XII (Zoology section), Chapter: Evolution, Topic: Theories, Hardy-Weinberg principle and evidences.
Mutations introduce new genetic variations, increasing the genetic diversity of a population.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Life History Variations and Population Interactions - Overview
Overhunting or natural disasters can drastically reduce population size, leading to a bottleneck effect and loss of genetic diversity.
Ref: NCERT Class 12 Biology Chapter 11: Organisms and Populations Life History Variations and Population Interactions - Overview
The Hardy-Weinberg Principle states that allele frequencies remain stable unless affected by evolutionary forces like mutation or selection.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Darwinism Lamarckism and Modern Synthetic Theory
Gene flow involves the introduction of new alleles due to the migration of individuals between populations.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Mechanism of Evolution - Hardy-Weinberg and Natural Selection
Hardy-Weinberg Principle is based on the binomial expansion (p + q)² = 1, representing allele frequency stability in a population.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Mechanism of Evolution - Hardy-Weinberg and Natural Selection
Mutations are random changes in the genetic material that lead to the formation of new alleles in a population.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Mechanism of Evolution - Hardy-Weinberg and Natural Selection
Saltation refers to a sudden and large genetic change, as proposed by Hugo de Vries in mutation theory.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Mechanism of Evolution - Hardy-Weinberg and Natural Selection
Gene flow, or migration of individuals, introduces new genes and disrupts Hardy-Weinberg equilibrium.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Mechanism of Evolution - Hardy-Weinberg and Natural Selection
A small population size disrupts Hardy-Weinberg equilibrium due to genetic drift, which is significant in small populations.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Mechanism of Evolution - Hardy-Weinberg and Natural Selection
Stabilizing selection favors intermediate traits, reducing variation and maintaining the status quo in a population.
Ref: NCERT Class 12 Biology Chapter 6: Evolution Origin of Life - Theories Miller Urey Experiment
The Hardy-Weinberg Principle states that allele frequencies remain constant unless affected by evolutionary forces.
Ref: NCERT Class 12 Biology Chapter 4: Principles of Inheritance and Variation Mendel's Laws - Dominance Segregation Independent Assortment
