Class 12 Exam > Class 12 Notes > Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12
Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 PDF Download
POLYGENIC INHERITANCE
Inheritance of characters in which one character is controlled by many genes and intensity of character depends upon the number of dominant allele.
Polygenic inheritance first described byNilsson - Ehlein kernal colour of wheat.
Nilsson - Ehle said that kernal colour of wheat is regulated by two pairs of gene.
RR BB × rrbb Red White
Example-2. :- Colour of the skin in Human.
The inheritance of colour of skin in human studied by Devenport.
Five types of phenotype of colour of skin are found in human.
When a Negro (AA BB) phenotype crossed with white (aa bb) phenotype, intermediate phenotype produced in F1 generation . Phenotypes of F2 generation as follows.
Phenotypic ratioof F2 generation of quantitative inheritance as
- In new discovery human skin colour and kernal colour in wheat is regulated by 3 pairs of alleles so phenotypic ration of F2 generation.
FAQs on Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12
| 1. What is polygenic inheritance? |  |
Polygenic inheritance is a type of inheritance pattern where a trait is controlled by multiple genes, rather than just one gene. These genes often interact with each other and with the environment to determine the phenotype of the trait. Each gene contributes a small effect to the overall phenotype, resulting in a continuous variation of the trait in a population.
| 2. How does polygenic inheritance differ from Mendelian inheritance? | |
Polygenic inheritance differs from Mendelian inheritance in several ways. In Mendelian inheritance, traits are controlled by a single gene, and the inheritance pattern follows predictable ratios, such as the 3:1 ratio for a monohybrid cross. In contrast, polygenic inheritance involves multiple genes and does not follow these predictable ratios. Additionally, Mendelian inheritance often results in distinct phenotypes, while polygenic inheritance produces a continuous range of phenotypic variation.
| 3. What are some examples of traits controlled by polygenic inheritance? | |
There are numerous examples of traits controlled by polygenic inheritance. Some common examples include height, skin color, eye color, intelligence, and susceptibility to diseases like diabetes and heart disease. These traits exhibit a wide range of phenotypic variation in a population due to the combined effects of multiple genes.
| 4. How does the environment influence polygenic traits? | |
The environment plays a crucial role in the expression of polygenic traits. While genes contribute to the potential range of variation, environmental factors can influence how these genes are expressed. For example, height is influenced by both genetic factors and nutrition during childhood. Similarly, skin color can be affected by exposure to sunlight. The interplay between genes and the environment is what ultimately determines the phenotype of a polygenic trait.
| 5. Can polygenic traits be predicted or controlled? | |
Predicting and controlling polygenic traits can be challenging due to the complex nature of their inheritance. Since multiple genes and environmental factors contribute to the expression of these traits, it is difficult to accurately predict their outcome. However, advances in genetic research and technologies like genome-wide association studies (GWAS) have provided insights into the genes involved in polygenic traits. While complete control over polygenic traits is currently not possible, understanding their genetic basis can help in making informed decisions and interventions related to these traits.
Related Exams
About this Document
|
1.2K Views |
|
4.63/5 Rating |
|
Nov 15, 2024 Last updated |
Document Description: Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 for Class 12 2024 is part of Class 12 preparation. The notes and questions for Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 have been prepared according to the Class 12 exam syllabus. Information about Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 covers topics like and Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 Example, for Class 12 2024 Exam. Find important definitions, questions, notes, meanings, examples, exercises and tests below for Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12.
Introduction of Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 in English is available as part of
our Class 12 preparation & Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 in Hindi for Class 12
courses. Download more important topics, notes, lectures and mock test series for Class 12
Exam by signing up for free. Class 12: Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12
Description
Full syllabus notes, lecture & questions for Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 - Class 12 | Plus excerises question with solution to help you revise complete syllabus | Best notes, free PDF download
Information about Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12
In this doc you can find the meaning of Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 defined & explained in the simplest way possible.
Besides explaining types of Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 theory,
EduRev gives you an ample number of questions to practice Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 tests, examples and also practice Class 12 tests.
Download as PDF
|
Explore Courses for Class 12 exam
|
|
Signup for Free!
Signup to see your scores go up within 7 days! Learn & Practice with 1000+ FREE Notes, Videos & Tests.
Related Searches
Previous Year Questions with Solutions
,Viva Questions
,Polygenic Inheritance - Principles of Inheritance and Evolution
,Sample Paper
,Polygenic Inheritance - Principles of Inheritance and Evolution
,Free
,Polygenic Inheritance - Principles of Inheritance and Evolution
,Biology
,Class 12
,ppt
,study material
,Extra Questions
,Important questions
,MCQs
,Semester Notes
,Class 12
,Exam
,past year papers
,Summary
,Biology
,Class 12
,video lectures
,shortcuts and tricks
,mock tests for examination
,Biology
,practice quizzes
,Objective type Questions
;
Additional Information about Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 for Class 12 Preparation
Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 Free PDF Download
The Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 is an invaluable resource that delves deep into the core of the Class 12 exam.
These study notes are curated by experts and cover all the essential topics and concepts, making your preparation more efficient and effective.
With the help of these notes, you can grasp complex subjects quickly, revise important points easily,
and reinforce your understanding of key concepts. The study notes are presented in a concise and easy-to-understand manner,
allowing you to optimize your learning process. Whether you're looking for best-recommended books, sample papers, study material,
or toppers' notes, this PDF has got you covered. Download the Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 now and kickstart your journey towards success in the Class 12 exam.
Importance of Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12
The importance of Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 cannot be overstated, especially for Class 12 aspirants.
This document holds the key to success in the Class 12 exam.
It offers a detailed understanding of the concept, providing invaluable insights into the topic.
By knowing the concepts well in advance, students can plan their preparation effectively.
Utilize this indispensable guide for a well-rounded preparation and achieve your desired results.
Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 Notes
Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 Notes offer in-depth insights into the specific topic to help you master it with ease.
This comprehensive document covers all aspects related to Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12.
It includes detailed information about the exam syllabus, recommended books, and study materials for a well-rounded preparation.
Practice papers and question papers enable you to assess your progress effectively.
Additionally, the paper analysis provides valuable tips for tackling the exam strategically.
Access to Toppers' notes gives you an edge in understanding complex concepts.
Whether you're a beginner or aiming for advanced proficiency, Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 Notes on EduRev are your ultimate resource for success.
Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 Class 12 Questions
The "Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 Class 12 Questions" guide is a valuable resource for all aspiring students preparing for the
Class 12 exam. It focuses on providing a wide range of practice questions to help students gauge
their understanding of the exam topics. These questions cover the entire syllabus, ensuring comprehensive preparation.
The guide includes previous years' question papers for students to familiarize themselves with the exam's format and difficulty level.
Additionally, it offers subject-specific question banks, allowing students to focus on weak areas and improve their performance.
Study Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 on the App
Students of Class 12 can study Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 alongwith tests & analysis from the EduRev app,
which will help them while preparing for their exam. Apart from the Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12,
students can also utilize the EduRev App for other study materials such as previous year question papers, syllabus, important questions, etc.
The EduRev App will make your learning easier as you can access it from anywhere you want.
The content of Polygenic Inheritance - Principles of Inheritance and Evolution, Biology, Class 12 is prepared as per the latest Class 12 syllabus.
|
© EduRev
|
Education Revolution
|
Follow Us
|
Signup to see your scores
go up within 7 days!
Access 1000+ FREE Docs, Videos and Tests
Takes less than 10 seconds to signup