Principles Of Inheritance And Variation — DPP 17

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
If Aabb $\times$ aaBb, then genotypic ratio of its progeny will be :-
  1. A $9 : 3 : 3 : 1$
  2. B $1 : 2 : 1$
  3. C $1 : 1 : 1 : 1$
  4. D $4 : 1$
Show answer

Correct answer: C

2
Which one of the following symbols and its representation, used in human pedigree analysis is correct?
Principles Of Inheritance And Variation – NEET-5070
  1. A unaffected female
  2. B male affected
  3. C mating between relatives
  4. D O = unaffected male
Show answer

Correct answer: C

3
Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage ?
  1. A Erythroblastosis fetalis -X linked
  2. B Down syndrome - 44 autosomes + XO
  3. C Klinefelter's syndrome -44 autosomes +XXY
  4. D Colour blindness - Y linked
Show answer

Correct answer: C

4
Which is not a correct match :-
  1. A Deletion - Loss of a segment of DNA result in alteration in chromosome
  2. B Insertion - Gain of a segment of DNA, result in alteration in chromosome
  3. C Aberration - Result of chromosomal alteration
  4. D Sickle cell anaemia - A classical example of frame shift mutation
Show answer

Correct answer: D

5
Read the following statement and choose incorrect statement : (According to Mendel experiment)
  1. A Mendel crossed tall and dwarf pea plant to study the inheritance of one gene known as Monohybrid cross.
  2. B In monohybrid cross, $\mathrm { F } _ { 1 }$ progeny plants were similar to one of its parents
  3. C In $\mathrm{F _ { 2 }}$ generation of monohybrid cross, only one of the parental trait was expressed
  4. D In $\mathrm{F _ { 2 }}$ generation of monohybrid cross both the traits were expressed in the proportion 3:1.
Show answer

Correct answer: C

6
Two genes R and Y are located very close on the chromosomal linkage map of maize plant. When RRYY and rryy genotypes are hybridized, the $\mathrm{F _ { 2 }}$ segregation will show :-
  1. A Higher number of the recombinant types.
  2. B Segregation in the expected 9:3:3:1 ratio.
  3. C Segregation in 3:1 ratio.
  4. D Higher number of the parental types
Show answer

Correct answer: D

7
ABO blood groups in humans are controlled by the gene I . It has three alleles - $\mathrm { I } ^ { \mathrm { A } } , \mathrm { I } ^ { \mathrm { B } }$ and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?
  1. A Four
  2. B Two
  3. C Three
  4. D One
Show answer

Correct answer: A

8
"When two pairs of traits are combined in a hybrid, segregation of one pair of characters is independent of the other pair of characters". This explains :-
  1. A Law of dominance
  2. B Law of segregation
  3. C Law of independent assortment
  4. D Postulate of paired factors
Show answer

Correct answer: C

9
Given below are two statements:
Statement-I : Behaviour of chromosome is parallel to the behaviour of genes.
Statement-II : Sutton and Boveri used chromosomal movement to explain Mendel's laws.
In the light of the above statements, choose the most appropriate answer from the options given below:
  1. A Both Statement-I and Statement-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 Statement-II are correct.
Show answer

Correct answer: D

10
Which genetic disorder presented in Queen Victoria's family :-
  1. A Colour blindness
  2. B Haemophilia
  3. C Cystic fibrosis
  4. D Thalassemia
Show answer

Correct answer: B

11
A pedigree is shown below for a disease that is autosomal dominant. The genetic make up of the first generation is :-
Principles Of Inheritance And Variation – NEET-5048
  1. A $\mathrm { AA } , \mathrm { Aa }$
  2. B $\mathrm { Aa } , \mathrm { aa }$
  3. C $\mathrm { Aa } , \mathrm { AA }$
  4. D $\mathrm { Aa } , \mathrm { Aa }$
Show answer

Correct answer: B

12
Following symbol shows :-
Principles Of Inheritance And Variation – NEET-5111

  1. A Affected individual
  2. B Mating between non relative
  3. C Mating between relative
  4. D Parents with male child
Show answer

Correct answer: C

13
The figure below shows three types of sex determination. Select the option giving correct identification.
Principles Of Inheritance And Variation – NEET-5175
  1. A B - XY males, XX females
  2. B A - XO Males, XX females
  3. C B - XY females, XX males
  4. D C - ZZ females, XX males
Show answer

Correct answer: A

14
Given below are two statements:
Statement-I : Dominant disorder in human cause due to formation of any undesired chemical/protein.
Statement-II : Recessive disorder occurs due to lack of protein in animals.
In the light of the above statements, choose the most appropriate answer from the options given below:
  1. A Both Statement-I and Statement-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 Statement-II are correct.
Show answer

Correct answer: D

15
Myotonic dystrophy is an example of :-
  1. A Autosomal recessive trait
  2. B Autosomal dominant trait
  3. C Sex linked recessive trait
  4. D Sex linked dominant trait
Show answer

Correct answer: B

16
Assertion (A) : In human, we don't just have tall or short people as two distinct alternatives but a whole range of possible heights.
Reason (R) : Human skin colour is a classic example of pleiotropic gene.
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

17
Which of the following type of gamete will not be produce by a genotype AAbbCcDd :-
  1. A AbCd
  2. B AbcD
  3. C AbCD
  4. D AbCcd
Show answer

Correct answer: D

18
Cross $\mathrm { AABb } \times \mathrm {aaBb}$ yields $\mathrm {AaBB: AaBb: Aabb : aabb}$ offspring in the ratio of :-
  1. A $0 : 3 : 1 : 1$
  2. B $1 : 2 : 1 : 0$
  3. C $1 : 1 : 1 : 1$
  4. D $1 : 2 : 1 : 1$
Show answer

Correct answer: B

19
Which disease is sex linked recessive disease?
  1. A Haemophilia
  2. B Sickle cell anaemia
  3. C Phenylketonuria
  4. D Thalassemia
Show answer

Correct answer: A

20
If two pea plants having red (dominant) coloured flowers with unknown genotypes are crossed, $75 \%$ of the flowers are red and $25 \%$ are white. The genotypic constitution of the parents having red coloured flowers will be:
  1. A Both homozygous
  2. B One homozygous and other heterozygous
  3. C Both heterozygous
  4. D Both hemizygous
Show answer

Correct answer: C

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 →