Principles Of Inheritance And Variation — DPP 16

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.

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1
The most popularly known blood grouping is the ABO grouping. It is named ABO and not ABC , because " O " in it refers to having:
  1. A No antigens A and B on RBCs
  2. B Other antigens besides A and B on RBCs
  3. C Overdominance of this type on the genes for A and B types
  4. D One antibody only - either anti-A or anti-B on the RBCs
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Correct answer: A

2
Regarding a pair of dominant / recessive traits which of the following combination is wrong?
  1. A Flower colour - Violet / white
  2. B Flower position - Axial / terminal
  3. C Pod shape - Inflated / constricted
  4. D Seed colour - Green / yellow
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Correct answer: D

3
(i) Segregation of alleles is a $\_\_\_\_$ (a) $\_\_\_\_$ process
(ii) Dwarf character shows itself in $\_\_\_\_$ (b) $\_\_\_\_$ condition.
Fill the correct option respectively :
  1. A a-Sequenced, b-heterozygous
  2. B a-Random, b-homozygous
  3. C a-Random, b-heterozygous
  4. D a-Sequenced, b-homozygous
Show answer

Correct answer: B

4
Which is a dominant trait :-
  1. A Colour blindness
  2. B Albinism
  3. C Haemophilia
  4. D Rh factor
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Correct answer: D

5
A normal visioned man whose father was colour-blind marries a woman whose father was also colour blind. They have their first child as a daughter. What are the chances that this child would be colour-blind?
  1. A $25 \%$
  2. B $50 \%$
  3. C $100 \%$
  4. D Zero percent
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Correct answer: D

6
In human right handedness is dominant over left handedness. What offsprings would be expected from two left handed parents :-
  1. A Only left handed
  2. B Only right handed
  3. C Left handed & right handed both
  4. D Neither left handed nor right handed
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Correct answer: A

7
What would be the colour of flower in $\mathrm{F _ { 1 }}$ progeny as a result of cross between homozygous red and homozygous white flowered Snapdragon ?
  1. A Red
  2. B White
  3. C Red and White
  4. D Pink
Show answer

Correct answer: D

8
Which of the following is correctly matched :-
  1. A Stem height-chromosome number 1
  2. B Seed colour - chromosome number 2
  3. C Pod colour - chromosome number 5
  4. D Pod shape - chromosome number 7
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Correct answer: C

9
Select the incorrect statement from the following:
  1. A Baldness is a sex-limited trait.
  2. B Linkage is an exception to the principle of independent assortment in heredity.
  3. C Galactosemia is an inborn error of metabolism.
  4. D Small population size results in random genetic drift in a population.
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Correct answer: A

10
If distance between gene on chromosome is more, then gene shows :-
  1. A Weak linkage
  2. B Strong linkage
  3. C Less crossing
  4. D Both (A) and (C)
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Correct answer: A

11
In which mode of inheritance do you expect more maternal influence among the offspring?
  1. A Autosomal
  2. B Cytoplasmic
  3. C Y-linked
  4. D X-linked
Show answer

Correct answer: B

12
Which match is not correct :-
  1. A Crossing over - Recombination of genes
  2. B Turner's syndrome - Additional copy of X-chromosome
  3. C Test cross - $\mathrm { Tt } \times \mathrm { tt }$
  4. D Polyploidy - more than two sets of chromosomes
Show answer

Correct answer: B

13
A human male produces sperms with the genotypes $\mathrm { AB } , \mathrm { Ab } , \mathrm { aB }$, and ab , in equal proportions. What is the corresponding genotype of this person :-
  1. A AaBb
  2. B AaBB
  3. C AABb
  4. D AABB
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Correct answer: A

14
If selfing occurs in the plant having genotype RrYy, then ratio of given genotype will be :- RRYY, RrYY, RRYy, RrYy
  1. A $1 : 2 : 2 : 4$
  2. B $1 : 2 : 2 : 1$
  3. C $1 : 1 : 1 : 1$
  4. D $2 : 2 : 2 : 1$
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Correct answer: A

15
Which of the four couples, claiming the baby with $\mathrm { O } ^ { + }$blood type are possibly the biological parents of it?
  1. A $\mathrm {A B} ^ { - }$and $\mathrm {A} ^ { + }$
  2. B $\mathrm { A } ^ { + }$and $\mathrm { O } ^ { - }$
  3. C $\mathrm { O } ^ { + }$and $\mathrm { AB } ^ { + }$
  4. D $\mathrm { B } ^ { - }$and $\mathrm { O } ^ { - }$
Show answer

Correct answer: B

16
If there are four allelic forms for the gene controlling ABO blood group then what will be the number of possible genotypes?
  1. A 6
  2. B 10
  3. C 12
  4. D 14
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Correct answer: B

17
Test cross in plants or in Drosophila involves crossing :-
  1. A Between two genotypes with dominant trait.
  2. B Between two genotypes with recessive trait.
  3. C Between two $\mathrm{F _ { 1 }}$ hybrids.
  4. D The $\mathrm{F _ { 1 }}$ hybrid with a double recessive genotype.
Show answer

Correct answer: D

18
The modified allele is equivalent to the unmodified allele when it produces :-
  1. A Normal enzyme
  2. B A non-functional enzyme
  3. C No enzyme at all
  4. D Inactive enzyme
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Correct answer: A

19
The Punnett square shown below represents the pattern of inheritance in dihybrid cross when yellow $( \mathrm { Y } )$ is dominant over white $( \mathrm { y } )$ and round ( R ) is dominant over wrinkled ( r ) seeds:-
Principles Of Inheritance And Variation – NEET-5150 A plant of 'H' type will produce seeds with the genotype identical to seeds produced by the plants of:-

  1. A Type M
  2. B Type J
  3. C Type P
  4. D Type N
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Correct answer: D

20
In a family, father has a blood group ' A ' and mother has a blood group ' B '. Their children show 50\% probability for a blood group 'AB' indicating that :-
  1. A Father is heterozygous
  2. B Mother is heterozygous
  3. C Either of parent is heterozygous
  4. D Mother is homozygous
Show answer

Correct answer: C

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