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Online Mock Tests
Chapters
2: Reproduction in Lower and Higher Animals
▶ 3: Inheritance and Variation
4: Molecular Basis of Inheritance
5: Origin and Evolution of Life
6: Plant Water Relation
7: Plant Growth and Mineral Nutrition
8: Respiration and Circulation
9: Control and Co-ordination
10: Human Health and Diseases
11: Enhancement of Food Production
12: Biotechnology
13: Organisms and Populations
14: Ecosystems and Energy Flow
15: Biodiversity, Conservation and Environmental Issues
![SCERT Maharashtra solutions for Biology [English] 12 Standard HSC chapter 3 - Inheritance and Variation - Shaalaa.com](/images/biology-english-12-standard-hsc_6:1b94e35560a844c094a1f846c467d1b4.biology "SCERT Maharashtra solutions for Biology [English] 12 Standard HSC chapter 3 - Inheritance and Variation")
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Solutions for Chapter 3: Inheritance and Variation
Below listed, you can find solutions for Chapter 3 of Maharashtra State Board SCERT Maharashtra for Biology [English] 12 Standard HSC.
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 3 Inheritance and Variation MCQ
1 Marks
The three principles of Mendelism are
Dominance, segregation, and independent assortment
Linkage, segregation, and independent assortment
Linkage, dominance, and segregation
Linkage, dominance, and Independent assortment.
1 Marks
Which one of the following is back cross?
F1 × F1
F1 × Recessive parent
F1 × Dominant parent
F1 × Any parent
1 Marks
RR (Red) Antirrhinum is crossed with white (rr) one. Offspring (Rr) are pink. This is an example of ______.
Dominant -recessive
Incomplete dominance
Hybrid
Supplementary genes
1 Marks
The word chromosome was coined by
Benda
Waldeyer
Robert Hooke
T.H.Morgan
1 Marks
Nullisomy is represented by ______.
(2n-1)
(2n-2)
(2n+1)
(2n+2)
1 Marks
Identify the odd one:-
Monoploidy
Diploidy
Polyploidy
Hyperploidy
1 Marks
In humans, the sex chromosome complement is
XX-XY
XX-XO
ZZ-ZO
ZW-ZZ
1 Marks
A family has five daughters and expecting sixth child. The chance of its beings a son is
zero
25%
50%
100%
1 Marks
In human beings 45 chromosomes/single X/XO abnormality causes ______.
Down's syndrome
Klinfelter's syndrome
Turner's syndrome
Edward's syndrome
1 Marks
Webbed neck is characteristic of ______ syndrome.
XXX
YY
XXY
XO
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 3 Inheritance and Variation Very Short Answer
1 Marks
Define inheritance.
1 Marks
What is allelomorph?
What is a test cross?
1 Marks
Define euploidy.
1 Marks
Give an example of complete linkage.
1 Marks
How many linkage groups are present in Drosophila melanogaster?
1 Marks
Which genes show straight inheritance?
1 Marks
How drones are produced in honey bees?
1 Marks
What is the reason for the 21st trisomy?
1 Marks
Give the example of X- monosomy you have studied.
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 3 Inheritance and Variation Short Answer 1
2 Marks
Discuss any two points due to which Mendel got success in his experiment?
2 Marks
Give any two points of difference between homozygous and heterozygous.
2 Marks
Explain test cross with suitable example and state its ratios.
2 Marks
Give an account of incomplete dominance with a suitable example.
2 Marks
Explain codominance in colour coat in cattle with checker board method.
2 Marks
Write an account of the chromosomal theory of inheritance.
2 Marks
Write a note on sex linkage.
2 Marks
Differentiate between complete and incomplete linkage.
2 Marks
Explain the mechanism of sex determination in birds.
2 Marks
Give a detail account of thalassemia.
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 3 Inheritance and Variation Short Answer 2
3 Marks
Enlist dominant and recessive characters in pea plant with respect to the position of flower, colour of seed and colour of a pod in tabulated form.
3 Marks
Short Answer Question.
Write a note on pleiotropy.
3 Marks
Describe the structure of sex chromosomes with the help of labelled diagram.
3 Marks
What is autosomal inheritance? Explain different disorders due to autosomal inheritance.
3 Marks
Explain the inheritance pattern of colour blindness with a suitable chart.
3 Marks
Write a note on bleeder’s disease and its inheritance with a suitable chart.
3 Marks
Explain the mechanism of sex determination in humans with a suitable chart.
3 Marks
Write a note on Down’s syndrome.
3 Marks
What are the different characters that develop due to Klinefelter's syndrome?
3 Marks
Give reasons for the development of Turner’s syndrome and also mention its symptoms.
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC 3 Inheritance and Variation Long Answer
4 Marks
Define inheritance. Give statements for various laws of inheritance.
4 Marks
Explain intragenic and intergenic interaction with the help of example.
4 Marks
Explain the structure of chromosomes with labelled diagram.
4 Marks
Give detail account of sex-linked inheritance.
4 Marks
Give an account of one Mendelian and one chromosomal disorder you have studied.
Solutions for 3: Inheritance and Variation
SCERT Maharashtra solutions for Biology [English] 12 Standard HSC chapter 3 - Inheritance and Variation
Shaalaa.com has the Maharashtra State Board Mathematics Biology [English] 12 Standard HSC Maharashtra State Board solutions in a manner that help students grasp basic concepts better and faster. The detailed, step-by-step solutions will help you understand the concepts better and clarify any confusion. SCERT Maharashtra solutions for Mathematics Biology [English] 12 Standard HSC Maharashtra State Board 3 (Inheritance and Variation) include all questions with answers and detailed explanations. This will clear students' doubts about questions and improve their application skills while preparing for board exams.
Further, we at Shaalaa.com provide such solutions so students can prepare for written exams. SCERT Maharashtra textbook solutions can be a core help for self-study and provide excellent self-help guidance for students.
Concepts covered in Biology [English] 12 Standard HSC chapter 3 Inheritance and Variation are Overview of Inheritance and Variation, Gregor Johann Mendel – Father of Genetics, Mendel's Experiments on Inheritance, Reasons for Mendel's Success, Genetic Terminology, Monohybrid Cross, Dihybrid Cross, Mendel's Laws > The Law of Dominance, Mendel's Laws > The Law of Segregation (Law of Purity of Gametes), Mendel's Laws > The Law of Independent Assortment, Back Cross and Test Cross, Deviations from Mendel’s Findings, Exceptions to Mendel's Principles > Incomplete Dominance, Exceptions to Mendel's Principles > Co-Dominance, Exceptions to Mendel's Principles > Multiple alleles, Exceptions to Mendel's Principles > Pleiotropy, Chromosomal Theory of Inheritance, Chromosomes - The Carriers of Heredity, Types of Chromosomes, Linkage and Crossing Over, Autosomal Inheritance, Sex Linked Inheritance, Colour blindness, Haemophilia, Sex Determination, Sex Determination in Humans, Sex Determination in Birds, Sex Determination in Honey Bees, Human Genetic Disorders, Thalassemia, Down's syndrome (Mongolian Idiocy), Turner's Syndrome, Klinefelter's Syndrome, Heredity.
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