Principles Of Inheritance And Variation — DPP 19

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
Statement I: Male honeybees do not have fathers and sons.
Statement II: Male grasshoppers have two X chromosomes besides autosomes.
  1. A Statement I is incorrect, but Statement II is correct.
  2. B Statement I is correct, but Statement II is incorrect.
  3. C Both Statement I and Statement II are correct
  4. D Both Statement I and Statement II are incorrect
Show answer

Correct answer: B

2
What is the probability of gamete AbC produced by a plant having genotype AaBbCc (If all the genes are situated on different chromosomes) ?
  1. A $1 / 2$
  2. B $1 / 4$
  3. C $1 / 6$
  4. D $1 / 8$
Show answer

Correct answer: D

3
Assertion: Sickle cell anaemia is an autosomal disorder that shows co-dominance in heterozygous condition.
Reason: Round and Sickle-shaped, both types of RBCs are found in a person heterozygous for Sickle cell anaemia.
  1. A Both Assertion and Reason are correct, and Reason is the correct explanation of Assertion.
  2. B Assertion is correct but the reason is incorrect.
  3. C Assertion is incorrect but the reason is correct.
  4. D Both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
Show answer

Correct answer: A

4
The experimental verification of the chromosomal theory of inheritance was done by :-
  1. A Boveri
  2. B Sutton
  3. C T.H. Morgan
  4. D Bateson
Show answer

Correct answer: C

5
Which statement is not correct :-
  1. A ABO blood group is an example of multiple allelism.
  2. B Law of independent assortment is based on monohvbrid cross.
  3. C A set of haploid chromosome known as genome.
  4. D X-body name given by Henking.
Show answer

Correct answer: B

6
Which of the following law explains the proportion of $3 : 1$ obtained at the $\mathrm{F} _ { 2 }$ in a monohybrid cross?
  1. A Law of dominance
  2. B Theory of linkage
  3. C Law of independent assortment
  4. D Both (B) and (C)
Show answer

Correct answer: A

7
How many dominant traits are present in pea plant from the given list ?
Yellow seed colour, Green pod colour, Wrinkled seed shape, Violet flower colour, Terminal flower position, Full pod shape
  1. A 3
  2. B 4
  3. C 2
  4. D 5
Show answer

Correct answer: B

8
When AABBcc is crossed with AaBbCc then the ratio of hybrid for all the three genes is:-
  1. A $\frac { 1 } { 8 }$
  2. B $\frac { 1 } { 4 }$
  3. C $\frac { 1 } { 16 }$
  4. D $\frac { 1 } { 32 }$
Show answer

Correct answer: A

9
Proportion of progenies with round seeded and red flowered pea plants if cross is made between WwRr and ww Rr would be :-
  1. A $\frac { 3 } { 8 }$
  2. B $\frac { 1 } { 8 }$
  3. C $\frac { 4 } { 8 }$
  4. D $\frac { 2 } { 8 }$
Show answer

Correct answer: A

10
Given below are two statements :
Statement-I : Every gene, as you know by now, contains the information to express a particular trait.
Statement-II : In a diploid organism, there are two copies of each gene i.e. as a pair of alleles. Now these two alleles always be identical, as in heterozygote.
In the light of the above statements, choose the correct answer from the options given below:
  1. A Both statement I and II are incorrect
  2. B Statement I is correct but statement II is incorrect.
  3. C Statement I is incorrect but statement II is correct.
  4. D Both statement I and II are correct.
Show answer

Correct answer: B

11
In a dihybrid cross involving RRTT(red tall) × rrtt(white dwarf), what will be the ratio of red & tall plants in $\mathrm { F } _ { 2 ^ { - } }$
  1. A $3 : 1$
  2. B $1 : 1$
  3. C $1 : 2$
  4. D $2 : 3$
Show answer

Correct answer: B

12
Presence of one additional copy of a chromosome known as :-
  1. A Monosomy
  2. B Tetrasomy
  3. C Trisomy
  4. D Double monosomy
Show answer

Correct answer: C

13
Which are related to incomplete dominance in following :-
(i) Flower colour in Mirabilis Jalapa
(ii) Coat colour in cattle
(iii) ABO blood group
(iv) Flower colour in snapdragon
(v) Coat colour in mice
  1. A i, ii
  2. B i, iii
  3. C i, iv
  4. D ii, iii
Show answer

Correct answer: C

14
Study of family history about inheritance of a particular trait in several generations of a family is called :-
  1. A Phylogeny
  2. B Ontogeny
  3. C Pedigree analysis
  4. D Cladistics
Show answer

Correct answer: C

15
Given pedigree represents inheritance of myotonic dystrophy which is an autosomal dominant disorder. What will be genotype of parents ?
Principles Of Inheritance And Variation – NEET-4919
  1. A Mother - aa, Father - AA
  2. B Mother - AA, Father - aa
  3. C Mother - Aa, Father - aa
  4. D Mother - aa, Father - aa
Show answer

Correct answer: C

16
The pedigree shows the occurrence of albinism which is a recessive trait. If person 4 is homozygous, the carrier for the trait is:-
Principles Of Inheritance And Variation – NEET-5046
  1. A 1, 4, 5 and 6
  2. B 5 and 6
  3. C 1, 2 and 3
  4. D 1, 2, 5 and 6
Show answer

Correct answer: D

17
Given below are two statements; one is labelled as Assertion (A) and the other is labelled as Reason(R).
Assertion (A) : Unmodified Allele, which represents the original phenotype is the dominant allele.
Reason (R) : A dominant allele could be modified into recessive allele by only crossing over.
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: B

18
Given below are two statements : One is labelled as Assertion (A) and the other is labelled as Reason (R).
Assertion (A) : Female heterogamety is found in birds.
Reason (R) : Two different types of gametes in terms of the sex chromosomes, are produced by female birds.
In the light of the above statements, choose the correct answer from the options given below:
  1. A Both (A) and (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) and (R) are correct and (R) is the correct explanation of (A)
Show answer

Correct answer: D

19
If yellow body, white eyed Drosophila is crossed with wild brown body red eyes Drosophila. Then what would be frequency of recombinants in $\mathrm{F _ { 1 }}$ generation?
  1. A $100 \%$
  2. B $1.3 \%$
  3. C $98.7 \%$
  4. D $0 \%$
Show answer

Correct answer: D

20
Assertion (A) : Maximum 50% non-parental gene combinations are possibly produces during gamete formation.
Reason (R) : Maximum frequency of crossing over could be 100% because all four chromatids of tetrad are involves in crossing over.
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: B

Attempt this as a timed test

Reading answers is not the same as sitting the paper. Attempt it timed and you get your score, per-question timing, and the mistakes tracked for revision.

Start free

More Principles Of Inheritance And Variation tests

Principles Of Inheritance And Variation — DPP 1 20 Q Principles Of Inheritance And Variation — DPP 2 20 Q Principles Of Inheritance And Variation — DPP 3 20 Q Principles Of Inheritance And Variation — DPP 4 20 Q Principles Of Inheritance And Variation — DPP 5 20 Q Principles Of Inheritance And Variation — DPP 6 20 Q
All Principles Of Inheritance And Variation questions & tests →