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Balbharati solutions for Class 9 Science and Technology chapter 16 - Heredity and Variation

Balbharati Class 9 Science and Technology

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Balbharati Balbharati Class 9 Science and Technology

Balbharati Class 9 Science and Technology - Shaalaa.com

Chapter 16: Heredity and Variation

Exercise

Chapter 16: Heredity and Variation Exercise Exercise solutions [Page 193]

Exercise | Q 1.1 | Page 193

Complete the following sentence by choosing the appropriate word from the bracket. 

(Inheritance, sexual reproduction, asexual reproduction, chromosomes, DNA, RNA, gene) 

Hereditary characters are transferred from parents to offsprings by ............, hence they are said to be structural and functional units of heredity. 

Exercise | Q 1.2 | Page 193

Complete the following sentence by choosing the appropriate word from the bracket. 

(Inheritance, sexual reproduction, asexual reproduction, chromosomes, DNA, RNA, gene) 

Organisms produced by ............ show minor variations. 

Exercise | Q 1.3 | Page 193

Complete the following sentence by choosing the appropriate word from the bracket. 

(Inheritance, sexual reproduction, asexual reproduction, chromosomes, DNA, RNA, gene) 

The component which is in the nuclei of cells and carries the hereditary characteristics is called  ............. 

Exercise | Q 1.4 | Page 193

Complete the following sentence by choosing the appropriate word from the bracket. 

(Inheritance, sexual reproduction, asexual reproduction, chromosomes, DNA, RNA, gene) 

Chromosomes are mainly made up of ............. 

Exercise | Q 1.5 | Page 193

Complete the following sentence by choosing the appropriate word from the bracket. 

(Inheritance, sexual reproduction, asexual reproduction, chromosomes, DNA, RNA, gene) 

Organisms produced through ............ show major variations. 

Exercise | Q 2.1 | Page 193

Explain following.

Explain Mendel’s monohybrid progeny with the help of any one cross. 

Exercise | Q 2.2 | Page 193

Explain following.

Explain Mendel’s dihybrid ratio with the help of any one cross. 

Exercise | Q 2.3 | Page 193

Explain following.

Distinguish between monohybrid and dihybrid cross. 

Exercise | Q 2.4 | Page 193

Explain following.

Is it right to avoid living with a person suffering from a genetic disorder? 

Exercise | Q 3.1 | Page 193

Answer the following question in your own word. 

What is meant by ‘chromosome’. Explain its types. 

Exercise | Q 3.2 | Page 193

Answer the following question in your own word.

Describe the structure of the DNA molecule.

Exercise | Q 3.3 | Page 193

Answer the following question in your own word.

Express your opinion about the use of DNA fingerprinting. 

Exercise | Q 3.4 | Page 193

Answer the following question in your own word.

Explain the structure, function and types of RNA.

Exercise | Q 3.5 | Page 193

Answer the following question in your own word.

Why is it necessary for people to have their blood examined before marriage?

Exercise | Q 4.1 | Page 193

Write a brief note. 

Down syndrome 

Exercise | Q 4.2 | Page 193

Write a brief note. 

Monogenic disorders 

Exercise | Q 4.3 | Page 193

Write a brief note. 

Sickle cell anaemia: symptoms and treatment

Exercise | Q 4.3 | Page 193

Write a brief note. 

Sickle cell anaemia: symptoms and treatment

Exercise | Q 5 | Page 193

How are the items in groups A, B and C inter-releated?

    A    B    C

Leber hereditary optic neuropathy
44+XXY Pale skin,white hairs

Diabetes
 
45+X Men are sterile

Albinism
 
Mitochondrial
 disorder
Women are  sterile

Turner syndrome
 
Polygenic disorder
This disorder arises during development
of zygote.
 

Klinefelter syndrome
 
Monogenic disorder  Effect on blood-glucose level
Exercise | Q 6.1 | Page 193

Filling the blank based on the given relationship.

44+X:Turner syndrome: :44+XXY:- ..............

Exercise | Q 6.2 | Page 193

Filling the blank based on the given relationship.

3:1 Monohybrid: : 9:3:3:1 : .............

Exercise | Q 6.3 | Page 193

Filling the blank based on the given relationship.

Women : Turner syndrome : : Men : .......

Exercise | Q 7 | Page 193

Complete the tree diagram below based on types of hereditary disorders.

Chapter 16: Heredity and Variation

Exercise

Balbharati Balbharati Class 9 Science and Technology

Balbharati Class 9 Science and Technology - Shaalaa.com

Balbharati solutions for Class 9 Science and Technology chapter 16 - Heredity and Variation

Balbharati solutions for Class 9 chapter 16 (Heredity and Variation) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the Maharashtra State Board Balbharati Class 9 Science and Technology solutions in a manner that help students grasp basic concepts better and faster.

Further, we at Shaalaa.com provide such solutions so that students can prepare for written exams. Balbharati textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

Concepts covered in Class 9 Science and Technology chapter 16 Heredity and Variation are Genetic disorders : B. Diseases occuring due to mutation in single gene (monogenic disorders), Genetic disorders : Mitochondrial disorder, Genetic disorders : B. Diseases occuring due to mutation in single gene (monogenic disorders), Genetic disorders : A. Disorders due to chromosomal abnormalities:, Mendel’s principles of heredity, Ribonucleic acid (RNA) :, Chromosomes and it's Types, Deoxyribonucleic acid (DNA), Inheritance.

Using Balbharati Class 9 solutions Heredity and Variation exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in Balbharati Solutions are important questions that can be asked in the final exam. Maximum students of Maharashtra State Board Class 9 prefer Balbharati Textbook Solutions to score more in exam.

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