Principles of Inheritance and Variation — NEET Biology

Principles of Inheritance and Variation is the largest question pool in our NEET Biology bank. It runs from Mendel's laws and monohybrid and dihybrid crosses through incomplete dominance, co-dominance and multiple allelism, to linkage and recombination, sex determination, pedigree analysis, and chromosomal and Mendelian disorders. It rewards practice more than reading.

538
Practice questions
21
Free chapter tests
9
Topics covered

Topics in Principles of Inheritance and Variation

Principles of Inheritance and Variation — NEET questions with answers

8 worked examples from our bank of 538. Answers and explanations are below each question.

1
On which plant Mendel had carried out his investigations :-
  1. A Garden - pea
  2. B Wild pea
  3. C Cow-pea
  4. D Pigeon pea
Show answer

Correct answer: A

2
During breeding the removal of anthers from a flower is called :-
  1. A Anthesis
  2. B Pollination
  3. C Emasculation
  4. D Vasectomy
Show answer

Correct answer: C

3
Mendel formulated the law of purity of gametes on the basis of :-
  1. A Dihybrid cross
  2. B Monohybrid cross
  3. C Back cross
  4. D Test cross
Show answer

Correct answer: B

4
A cross between AaBB X aaBB yields a genotypic ratio of :-
  1. A 1 AaBB: 1 aaBB
  2. B 1 AaBB : 3 aaBB
  3. C 3AaBB : 1 aa BB
  4. D All AaBb
Show answer

Correct answer: A

5
In monohybrid cross what is the ratio of homozygous dominant and homozygous recessive individuals in $\mathrm { F } _ { 2 }$-generation :-
  1. A $1 : 2 : 1$
  2. B $2 : 1 / 1 : 2$
  3. C $3 : 1 / 1 : 3$
  4. D $1 : 1$
Show answer

Correct answer: D

6
The cross between recessive to it's hybrid or it's $\mathrm { F } _ { 1 }$ plant is called :-
  1. A Back cross
  2. B Test cross
  3. C Monohybrid cross
  4. D Dihybrid cross
Show answer

Correct answer: B

7
What is the genotypic and phenotypic ratio of monohybrid test cross :-
  1. A $1 : 1$
  2. B $1 : 2$
  3. C $3 : 1$
  4. D $1 : 2 : 1$
Show answer

Correct answer: A

8
Which law can be proved only by dihybrid cross?
  1. A Segregation
  2. B Purity of gametes
  3. C Dominance
  4. D Independent assortment
Show answer

Correct answer: D

530 more questions in this chapter, with timed tests and per-topic accuracy tracking.

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Principles of Inheritance and Variation — free practice tests (DPPs)

Each test is a timed set of questions from this chapter. Free to attempt.

Principles Of Inheritance And Variation — DPP 1
20 questions · 30 min
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Principles Of Inheritance And Variation — DPP 2
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Principles Of Inheritance And Variation — DPP 3
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Principles Of Inheritance And Variation — DPP 4
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Principles Of Inheritance And Variation — DPP 5
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Principles Of Inheritance And Variation — DPP 6
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Principles Of Inheritance And Variation — DPP 7
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Principles Of Inheritance And Variation — DPP 8
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Principles Of Inheritance And Variation — DPP 9
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Principles Of Inheritance And Variation — DPP 10
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Principles Of Inheritance And Variation — DPP 11
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Principles Of Inheritance And Variation — DPP 12
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Principles Of Inheritance And Variation — DPP 13
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Principles Of Inheritance And Variation — DPP 14
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Principles Of Inheritance And Variation — DPP 15
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Principles Of Inheritance And Variation — DPP 16
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Principles Of Inheritance And Variation — DPP 17
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Principles Of Inheritance And Variation — DPP 18
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Principles Of Inheritance And Variation — DPP 19
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Principles Of Inheritance And Variation — DPP 20
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Principles Of Inheritance And Variation — DPP 21
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Principles of Inheritance and Variation — frequently asked questions

Why do students lose marks in this chapter?

Almost always in numerical crosses and pedigree questions. Both are procedural skills — they improve with repetition, not with re-reading the theory.

Is pedigree analysis worth practising separately?

Yes. Pedigree questions follow a small number of recognisable patterns, and once you can classify the pattern the answer usually follows in one step.

Other NEET Biology chapters

Biological Classification 450 questions Cell — The Unit of Life 317 questions Human Reproduction 257 questions Molecular Basis of Inheritance 324 questions