Hardy-Weinberg Principle
Chapter Name : Evolution |
Sub Topic Code : 103_12_07_07_01 |
Topic Name : Hardy-Weinberg Principle |
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Sub Topic Name : Hardy-Weinberg Principle |
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Introduction
The Hardy – Weinberg principle predicts how gene frequencies will be inherited from generation to generation given a specific set of assumptions.
Pre-Requisites:
Understand the concept of frequency of occurrence of alleles of a gene.
Real Life Question:
How come a single gene have so many species and how do new species come to exist?
Key Words / FlashCards
| Key Words | Definitions (pref. in our own words) |
|---|---|
| Alleles | One of two or more alternative forms of a gene that arise by mutation and are found at the same place on a chromosome. |
| Locus | The location of a gene (or of a significant sequence) on a chromosome. |
| Diploid | Containing two complete sets of chromosomes, one from each parent. |
| Speciation | The formation of new and distinct species in the course of evolution. |
| Gametogenesis | The process in which cells undergo meiosis to form gametes. |
Learning aids / Gadgets
| Gadgets | How it can be used |
|---|---|
| Encyclopedia | Read about the Hardy – Weinberg principle in detail |
Places to visit :
Library
Practical examples around us
| Examples | Explainations |
|---|---|
| The blood group AB of people | Humans inherit either the A or the B antigen which is determined by two different alleles at the same gene locus. |
What you learn in Theory:
We learn that the Hardy-Weinberg principle states that in a large randomly breeding population, allelic frequencies will remain the same from generation to generation assuming that there is no mutation, gene migration, selection or genetic drift. This principle is important because it gives biologists a standard from which to measure changes in allele frequency in a population.
What you learn in Practice:
How do new species occur?