Download App

Principles of Inheritance and Variation — BIOLOGY STD 12 Science — Question

Maharashtra BoardEnglish MediumSTD 12 ScienceBIOLOGYPrinciples of Inheritance and Variation5 Marks
Question
Explain polygenic inheritance pattern with the help of a suitable example.
✓

Answer

Human height or skin colour are examples of polygenic inheritance.
Height trait is controlled by at least three gene pairs.
Additive effect allele contributes to the phenotypic expression of the trait.
The dominant alleles more are, more pronounced is the phenotypic expression or more in other word.
The recessive alleles less pronounced is the phenotypic expression.

Need a full question paper?

Generate a complete, print-ready paper with questions like this in minutes — across 16+ boards, with answer keys.

Start Generating Free

Explore more

More "Answer the following questions in detail." from Principles of Inheritance and Variation→Principles of Inheritance and Variation — all question types→BIOLOGY STD 12 Science question papers→Maharashtra Board STD 12 Science question papers→Maharashtra Board question paper generator→

Similar questions

What is blood clotting? How and when does it occur?
→
Describe the functions of the ecosystem.
→
A single base mutation in a gene may not ‘always’ result in loss or gain of function. Do you think the statement is correct? Defend your answer.
→
Mention three applications and future challenges of human genome project.
→
Describe the types of reproduction in lower plants (i) Budding and (ii) Sporulation. Illustrate your answer with suitable diagrams.
→
Alien species invasion.
→
Explain the structure of cerebrum. Structure of cerebrum
→
A person in your colony has recently been diagnosed with AIDS. People/residents in the colony want him to leave the colony for the fear a spread of AIDS.
  1. Write your view on the situation, giving reasons.
  2. List the possible preventive measures that you would suggest to the residents of your locality in a meeting organised by you so that they understand the situation.
  3. Write the symptoms and the causative agent of AIDS.
→
Reproductive and Child Healthcare (RCH) programmes are currently in operation. One of the major tasks of these programmes is to create awareness amongst people about the wide range of reproduction related aspects. As this is important and essential for building a reproductively healthy society.
  1. “Providing sex education in schools is one of the ways to meet this goal.” Give four points in support of your opinion regarding this statement.
  2. List any two ‘indicators’ that indicate a reproductively healthy society.
→
Explain the principles of cohesion tension theory and its limitations?
→