Principles of Inheritance and Variation MCQs | Principles of Inheritance and Variation Multiple Choice Questions and Answers

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Questions
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

Answer:Monohybrid cross
3 tt mates with Tt. What will be characteristic of offspring:
A 75% Ineffective
B 50% Uneffective
C 25% Uneffective
D All Effective

Answer: 50% Uneffective
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

Answer: Linkage
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

Answer:Edible pea
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

Answer: Gregor Mendel
11 Punnett square was developed by:
A Mendel
B Watson and Sutton
C Raginald
D Boveri

Answer:Raginald
12 Who introduced Chromosomal Theory of Inheritance?
A Mendel
B Sutton
C Reginald
D Boveri

Answer: Sutton
13 The plant Mendel used to study inheritance of two genes is:
A Apple
B Mango
C Garden pea
D Potato

Answer: Garden pea
14 Mendel published his work on inheritance of character in?
A 1870
B 1900
C 1865
D 1845

Answer: 1865
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

Answer: Dominant
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

Answer: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

Answer: 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

Answer: Homozygous
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