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Free download in PDF Principles of Inheritance and Variation Objective Type Questions with Answers for competitive exams. These short objective type questions with answers are very important for Board exams as well as competitive exams like NEET, AIIMS, JIPMER etc. These short solved questions or quizzes are provided by Gkseries./p>
(1)
How many type of phenotypes possible for ABO blood group
(2)
A person affected with phenylketonuria , lacks an enzyme that converts the amino acid phenylalanine into
[A]
Valine
[B]
Proline
[C]
Histidine
[D]
Tyrosine
(3)
Haemophilia in man is due to
[A]
Sex-linked inheritance
[B]
Sex-limited inheritance
[C]
Sex-influenced inheritance
[D]
Primary non-disjunction
Answer: Primary non-disjunction
(4)
In XO type of sex determination
[A]
Females produce two different types of gametes
[B]
Males produce two different types of gametes
[C]
Females produce gametes with Y chromosome
[D]
Males produce single type of gametes
Answer: Males produce two different types of gametes
(5)
Which one of the following cannot be explained on the basis of Mendel’s Law of Dominance?
[A]
Factors occur in pairs
[B]
The discrete unit controlling a particular character is called a factor
[C]
Out of one pair of factors one is dominant , and the other recessive
[D]
Alleles do not show any blending and both the characters recover as such in F2 generation
Answer: The discrete unit controlling a particular character is called a factor
(6)
The genotype of a plant showing the dominant phenotype can be determined by :
[A]
Back cross
[B]
Test cross
[C]
Dihybrid cross
[D]
Pedigree analysis
Answer: Pedigree analysis
(7)
Which one of the following conditions correctly describes the manner of determining the sex in the given example?
[A]
XO condition in humans as found in Turner syndrome , determines female sex
[B]
Homozygous sex chromosomes (XX) produce male in Drosophila
[C]
XO type of sex chromosomes determine male sex in grasshopper
[D]
Homozygous sex chromosomes (ZZ) determine female sex in birds
Answer: Homozygous sex chromosomes (XX) produce male in Drosophila
(8)
F2 generation in a Mendelian cross showed that both genotypic and phenotypic ratios are same as 1:2:1. It represents a case of
[A]
Monohybrid cross with complete dominanace
[B]
Monohybrid cross with incomplete dominance
[C]
Co-dominance
[D]
Dihybrid cross
Answer: Monohybrid cross with incomplete dominance
(9)
Alleles which can express only in pair with similar allele is
[A]
Dominant
[B]
Recessive
[C]
Co dominant
[D]
Lethal
(10)
Among the following traits that Mendel studied , choose the recessive one
[A]
Yellow pods
[B]
Axile flower
[C]
Terminal flower
[D]
Green seed
(11)
When a dominant ‘AA’ and a recessive ‘aa’ are crossed percentage of the progenies showing the parental genotypes will be
[A]
0%
[B]
25%
[C]
50%
[D]
100%
(12)
A normal visioned man whose father was colour blind ,marries a women whose father is also colour blind . They have their first child as a daughter . What are the chances that this child would be colour blind?
[A]
25%
[B]
50%
[C]
100%
[D]
0%
(13)
The incorrect statement with regard to Haemophilia is
[A]
It is a recessive disease
[B]
It is sex linked disease
[C]
It is a dominant disease
[D]
A single protein involved in the clotting of blood is affected
Answer: A single protein involved in the clotting of blood is affected
(14)
Person with blood group AB is considered as universal recipient because he has
[A]
Both A and B antibodies in the plasma
[B]
No antigen on RBC and no antibody in the plasma
[C]
Both A and B antigens in the plasma but no antibodies in the plasma
[D]
Both A and B antigens on RBC but no antibodies in the plasma
Answer: Both A and B antigens on RBC but no antibodies in the plasma
(15)
A patient with unknown blood group needs immediate blood transfusion. The group that can be donated will be
[A]
Blood group O
[B]
Blood group AB
[C]
Blood group A
[D]
Blood group B
(16)
Which Mendelian idea is depicted by a cross in which the F1 generation resembles both parents
[A]
Incomplete dominance
[B]
Inheritance of 1 gene
[C]
Co-dominance
[D]
Multiple allelism
(17)
An F2 hybrid generation will have
[A]
4 types of genotypes
[B]
7 types of genotypes
[C]
9 types of genotypes
[D]
16 types of genotypes
Answer: 16 types of genotypes
(18)
Who among the following is not concerned with re-discovery of Mendelism
[A]
Von Tschermak
[B]
Carl Correns
[C]
Theodre Bovery
[D]
Hugode Vries
(19)
The diploid number of drosophila melanogaster
[A]
8
[B]
10
[C]
11
[D]
12
(20)
Linkage phenomenon explained first by
[A]
William Batson
[B]
T.H.Morgan
[C]
Alfsed Sturtevent
[D]
Johanson
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