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Free download in PDF Principles of Inheritance and Variation Multiple Choice Questions and 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)
When F1 plants heterozygous for tallness are selfed F2, generation has both tall and dwarf plants. This proves the principle of:
[A]
Dominance
[B]
Blended inheritance
[C]
Law of segregation
[D]
Law of independent assortment
Answer: Law of segregation
(2)
Mendel’s formulated the law of purity of gametes on the basis of:
[A]
Test cross
[B]
Back cross
[C]
Monohybrid cross
[D]
Dihybrid cross
(3)
tt mates with Tt. What will be characteristic of offspring:
[A]
75% Ineffective
[B]
50% Uneffective
[C]
25% Uneffective
[D]
All Effective
(4)
Failure of segregation of chromatids during cell division Cycle result in the gain or loss of a cromosome (s) is called :
[A]
Female heterogamety
[B]
Male heterogamety
[C]
Aneuploidy
[D]
None of these
Answer: Female heterogamety
(5)
Exception of Mendel’s law is:
[A]
Dominance
[B]
Purity of gametes
[C]
Linkage
[D]
Independent assortment
(6)
Haemophilia is a:
[A]
Mendelian disorder
[B]
Chromosomal disorder
[C]
Can be (a) or (b)
[D]
None of the above
Answer: Mendelian disorder
(7)
Down’s syndrome is a:
[A]
Mendelian disorder
[B]
Chromosomal disorder
[C]
Can be both
[D]
None of the above
Answer: Chromosomal disorder
(8)
Mendel worked on :
[A]
Edible pea
[B]
Wild pea
[C]
Garden Pea
[D]
None of these
(9)
A gamete contains which of the following :
[A]
Both alleles of a gene
[B]
Only one allele of a gene
[C]
Al allele of a gene
[D]
No allele
Answer: Only one allele of a gene
(10)
Name the scientist who discovered the law of Heredity :
[A]
Gregor Mendel
[B]
Newton
[C]
Piinnett
[D]
None of these
(11)
Punnett square was developed by:
[A]
Mendel
[B]
Watson and Sutton
[C]
Raginald
[D]
Boveri
(12)
Who introduced Chromosomal Theory of Inheritance?
[A]
Mendel
[B]
Sutton
[C]
Reginald
[D]
Boveri
(13)
The plant Mendel used to study inheritance of two genes is:
[A]
Apple
[B]
Mango
[C]
Garden pea
[D]
Potato
(14)
Mendel published his work on inheritance of character in?
[A]
1870
[B]
1900
[C]
1865
[D]
1845
(15)
Female heterogamety is :
[A]
Two different types of gametes are produced by females
[B]
Four different types of gametes are produced by males
[C]
Can be both (a) and (b)
[D]
None of these
Answer: Two different types of gametes are produced by females
(16)
Individuals having dissimilar traits (alleles) on homologous chromosomes are called
[A]
Heterozygous
[B]
Homozygous
[C]
Dominant
[D]
Recessive
(17)
An allele is considered dominant
[A]
When it express in homozygosity
[B]
When it express even in the presence of alternate allele
[C]
When it express desirable phenotype
[D]
None of the above
Answer: When it express even in the presence of alternate allele
(18)
Mendel’s dihybrid ratio is
[A]
1:1:1:1
[B]
3:1
[C]
9:3:3:1
[D]
9:1:1:5
(19)
Mendel studied seven contrasting characters for his breeding experiment with Pisum sativum, which of the following characters did he not use?
[A]
Pod shape
[B]
Leaf shape
[C]
Plant height
[D]
Pod color
(20)
An organism with two identical allele of a gene in a cell is called
[A]
Heterozygous
[B]
Homozygous
[C]
Hybrid
[D]
Homozygous
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