Principles of Inheritance and Variation MCQs | NCERT Biology
Chapter-wise MCQs on 'Principles of Inheritance and Variation' for NEET UG Exam, based on NCERT Biology Class-12 (Chapter 4) with Answer Key and Solutions.
1.
Read the book NCERT Biology class-12 (chapter- 4): Principles of Inheritance and Variation from here.
1. Question
Read the following statements w.r.t Mendel's cross- hybridisation experiments using pure pea lines
- A pure line undergoes continuous self- pollination, shows stable trait inheritance and expression for several generations.
- Mendel considered seven characters for his experiments.
- Mendel selected 7 true-breeding plants for his experiments.
Choose the correct statement(s).
Only (a) and (b)
Only (b) and (c)
Only (c) and (a)
Only (c)
Correct Answer
Wrong Answer
2. Question
In which genetic condition, each cell in the affected person has 44 + XO condition?
Down's syndrome
Klinefelter's syndrome
Turner's syndrome
Edwards syndrome
Correct Answer
Wrong Answer
3. Question:
The best example for pleiotropy is:
Skin colour
Phenylketonuria
Colour blindness
ABO blood group
Correct Answer
Wrong Answer
4. Question
Statement-I : Recessive trait is seen due to non functional enzyme or because no enzyme is produced.
Statement-II : A true breeding line is one that, having undergone continuous self pollination, shows the stable trait inheritance.
Both Statement-I and II are correct.
Both Statement-I and II are incorrect.
Statement-I is correct but II is incorrect.
Statement-I is incorrect but II is correct.
Correct Answer
Wrong Answer
5. Question
Mendelian result remain unrecognized till 1900 because:
Communication was not easy in those day
Mendels concept of gene as stable and discrete units was not accepted by his contemporaries
Mendels approach of using mathematics to explain biological phenomena was totally new
All the above
Correct Answer
Wrong Answer
6. Question
Statement - I : In Morgan's experiment, cross-B showed less recombination than cross-A.
Statement - II : Walter Sutton and Theodore Boveri noted that the behaviour of chromosomes was parallel to the behaviour of genes
Statement I and II both are correct
Statement I and II both are incorrect
Only Statement I is correct
Only Statement II is correct
Correct Answer
Wrong Answer
7. Question
If a trihybrid mulatto man marries with white woman, how many different types of phenotypes can be obtained ?
4
3
2
5
Correct Answer
Wrong Answer
8. Question
Given below are two statements:
Statement I: Closely located genes assorted together and distantly located genes, due to recombination assorted independently.
Statement II : Many genes were linked to sexes also and called sex-linked genes.
Choose the correct answer from the option given below.
Both Statement I and Statement II are incorrect
Statement I is correct but Statement II is incorrect
Statement I is incorrect but Statement II is correct
Both Statement I and Statement II are correct
Correct Answer
Wrong Answer
9. Question
In the diagram given below how many are correct match:
Three
Four
Two
One
Correct Answer
Wrong Answer
10. Question
How many matching are correct:
| Condition | - | Associated Disorder | |
|---|---|---|---|
| a | Aneuploidy | - | Down syndrome |
| b | Polyploidy | - | Haemophilia |
| c | Polyploidy | - | Colour blindness |
| d | Clotting of blood affected | - | Haemophilia |
Three
Two
Four
One
Correct Answer
Wrong Answer
11. Question
Which one of the following is the incorrect match regarding human blood group:
Total type of allele – Three
Total type of genotype possible – Six
Total type of blood group – Four
Total type of phenotype possible– Five
Correct Answer
Wrong Answer
12. Question
Which one of the following disease are related with the given pedigree?
Phenylketonuria
Sickel cell anaemia
Thalassemia
All
Correct Answer
Wrong Answer
13. Question
Select the correct statement for the given diagram:
- It is related with mendelian disorder
- It is related with sickle cell anaemia
- It is related with haemoglobin
- It is related with a type of mutation
a, b, c, d
Only a, b
Only c, d
Only a, b, c
Correct Answer
Wrong Answer
14. Question
Which one of the following is Incorrect statement for artificial hybridisation :
It is one of the major Approaches of crop improvement progammes.
In this process emasculation and bagging techniques are involved
If the female parent produces unisexual flowers there is more need for emasculation
None of these
Correct Answer
Wrong Answer
15. Question
Which one of the following matching is incorrect :
Down syndrome → 47 chromosome
Turner syndrome → 45 chromosome
Klinefelter syndrome → 47 chromosome
None of these
Correct Answer
Wrong Answer
16. Question
Out of a population of 1600 individuals in F2 generation of a cross between yellow round and green wrinkled seeds of pea plants, what would be the number of green wrinkled seeds:
100
200
50
25
Correct Answer
Wrong Answer
17. Question
How many matching are correct regarding sex - determination:
| a. | Bird | Female heterogamety |
| b. | Grasshopper | XO type |
| c. | Human | XY type |
| d. | Bird | Male heterogamety |
2
3
4
1
Correct Answer
Wrong Answer
18. Question
Select the correct statement for the given diagram:
Diagrammatic representation of a linkage
Diagrammatic representation of dihybrid cross
Diagrammatic representation of a test cross
Diagrammatic representation of aneuploidy
Correct Answer
Wrong Answer
19. Question
In which genetical disease the number of chromosome is/are not change :
Cystic Fibrosis
Colour blindness
Phenylketonuria
All
Correct Answer
Wrong Answer
20. Question
Given below are two statements:
Statement I: In Down syndrome palm is broad with characteristic palm crease.
Statement II: In Down syndrome and Klinefelter syndrome total number of chromosome are same.
Choose the correct answer from the option given below:
Both Statement I and Statement II are incorrect
Statement I is correct but Statement II is incorrect
Statement I is incorrect but Statement II is correct
Both Statement I and Statement II are correct
