Principles Of Inheritance And Variation — DPP 2

20 NEET questions from Principles Of Inheritance And Variation, with answers and explanations. Attempt it as a timed test to get scoring, accuracy breakdown and mistake tracking.

Attempt this test free 20 questions · 30 minutes · +80 marks
1
How many types of genetically different gametes will be produced by a heterozygous plant having the genotype AABbCc?
  1. A Two
  2. B Four
  3. C Six
  4. D Nine
Show answer

Correct answer: B

2
If a homozygous red flowered plant is crossed with white plant, the offspring will be :-
  1. A All red flowered
  2. B All white flowered
  3. C Half red flowered
  4. D Half white flowered
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Correct answer: A

3
What result Mendel would have got when he self pollinated a dwarf $\mathrm{F _ { 2 }}$ plant ?
  1. A All tall plants
  2. B Tall and dwarf plants in 3:1 ratio
  3. C All dwarf plants
  4. D Tall and dwarf plants in 1:1 ratio
Show answer

Correct answer: B

4
When a tall plant with round seeds (TTRR) is crossed with a dwarf plant with wrinkled seeds (ttrr), the $\mathrm { F } _ { 1 }$ generation consists of tall plants with rounded seeds. How many types of gametes $\mathrm{F _ { 1 }}$ plant would produce :-
  1. A One
  2. B Three
  3. C Four
  4. D Eight
Show answer

Correct answer: C

5
Mendel's laws of inheritance are applicable on the plants which :-
  1. A Reproduce asexually
  2. B Reproduce sexually
  3. C Reproduce vegetatively
  4. D All of the above plants
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Correct answer: B

6
How many plants are dihybrid in $\mathrm{F _ { 2 }}$ generation of dihybrid cross :-
  1. A One
  2. B Two
  3. C Four
  4. D Sixteen
Show answer

Correct answer: C

7
Genes do not occur in pairs in :-
  1. A Zygote
  2. B Somatic cell
  3. C Embryo
  4. D Gametes
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Correct answer: D

8
Mendel did not select which character in his experiment :-
  1. A Plant height
  2. B Plant colour
  3. C Pod shape
  4. D Pod colour
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Correct answer: B

9
Segregation of genes take place during :-
  1. A Metaphase
  2. B Anaphase
  3. C Prophase
  4. D Embryo formation
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Correct answer: B

10
"Like begets like" an important and universal phenomenon of life, is due to :-
  1. A Eugenics
  2. B Inheritance
  3. C Dominance
  4. D Crossing-over
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Correct answer: B

11
Two crosses between the same pair of genotypes or phenotypes in which the sources of the gametes are reversed in one cross, is known as :-
  1. A Test cross
  2. B Reciprocal cross
  3. C Dihybrid cross
  4. D Reverse cross
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Correct answer: B

12
If hybrid red flowered plants of pea are crossed back to pure red flowered parent, the progeny will show :-
  1. A All red flowered plants
  2. B White flowered plants
  3. C $50 \%$ red and $50 \%$ white flowered plants
  4. D 3 Red : 1 white flowered plants
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Correct answer: C

13
A self fertilizing trihybrid plant forms :-
  1. A 8 different gametes and 32 zygotes
  2. B 8 different gametes and 64 zygotes
  3. C 4 different gametes and 16 zygotes
  4. D 8 different gametes and 16 zygotes
Show answer

Correct answer: B

14
When flowers are unisexual then emasculation is done in :-
  1. A Female
  2. B Male
  3. C (A) & (B) both
  4. D None of these
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Correct answer: D

15
A test cross is performed :-
  1. A by selfing of $\mathrm{F _ { 2 }}$ generation plants
  2. B by selfing of $\mathrm{F _ { 1 }}$ generation plants
  3. C to determine whether $\mathrm{F _ { 1 }}$ plant is homozygous or heterozygous
  4. D between a homozygous dominant and homozygous recessive plant
Show answer

Correct answer: C

16
A pure tall plant can be differentiated from a hybrid tall plant :-
  1. A By measuring length of plant
  2. B By spraying gibberellins
  3. C If all plants are tall after self-pollination
  4. D If all plants are dwarf after selfpollination
Show answer

Correct answer: C

17
Given below are two statements; one is labelled as Assertion (A) and the other is labelled as Reason(R).
Assertion (A) : A gene 'T' is responsible for tallness in pea plant.
Reason (R) : 'T' allele is functional, that produces normal enzyme.
In the light of the above statements, choose the correct answer from the options given below :
  1. A Both (A) & (R) are correct but (R) is not the correct explanation of (A).
  2. B (A) is correct but (R) is not correct.
  3. C (A) is not correct but (R) is correct.
  4. D Both (A) & (R) are correct and (R) is the correct explanation of (A).
Show answer

Correct answer: D

18
How many true breeding pea plant varieties were selected by Mendel?
  1. A 7
  2. B 14
  3. C 21
  4. D 28
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Correct answer: B

19
Multiple alleles can be found during study of:
  1. A Gametes
  2. B Individual
  3. C Population
  4. D All of the above
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Correct answer: C

20
Read the following statement and choose the correct set of statements.
A. Henking discovered X body in human spermatids.
B. Only one type of sex chromosome is found in the gametes of male Grasshopper.
C. In Drosophila the males have one X and one Y chromosome.
D. Allosomes are responsible for the characters that are common in male and female individuals.
  1. A A and C only
  2. B A, B and C only
  3. C B and C only
  4. D A, B, C and D
Show answer

Correct answer: C

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