Principles of Inheritance and Variation Multiple Choice Questions with Answers | Principles of Inheritance and Variation Quiz

1 Which principle of inheritance was not given by Mendel

A Independent assortment

B Dominance

C Purity of gametes

D Linkage

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Answer:Dominance

2 When dominant BB and recessive bb is crossed, the percentage of progeny showing the parental genotype is

A 0%

B 25%

C 50%

D 75%

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Answer: 25%

3 The year 1900AD is highly significant for genetics due to

A Chromosome theory of heredity

B Discovery of genes

C Rediscovery of Mendelism

D Principle of linkage

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Answer:Chromosome theory of heredity

4 The process by which the segregation of Mendelian factors takes place is

A Hybridisation

B Mitosis

C Meiosis

D Fertilisation

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Answer: Meiosis

5 Which would most probably be the genetic makeup of the parents of a colour blind daughter?

A Carrier mother and normal father

B Carrier mother and color blind father

C Color blind mother and normal father

D Normal mother and normal father

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Answer: Carrier mother and normal father

6 If a heterozygous tall plant is crossed with a homozygous dwarf plant the proportion of dwarf progeny will be

A 25%

B 50%

C 75%

D 100%

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Answer: 50%

7 When two tall plants are crossed 45 tall plants and 14 dwarf plants are obtained.The genotype of parent plants is

A TT x TT

B TT x tt

C Tt x Tt

D TT x Tt

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Answer: Tt x Tt

8 Which of the following is not a dominant character selected by Mendel in Pisum?

A Yellow pod color

B Violet flower colour

C Axillary flowers

D Yellow seed colour

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Answer:Axillary flowers

9 Variation can occur due to

A Mutations

B Recombination

C Fertilisation

D All of these

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Answer:Fertilisation

10 Who discovered the phenomenon of incomplete dominance in Mirabilis and Antirrhinum?

A De Vries

B Bateson

C Carl Correns

D Davenport

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Answer: Carl Correns

11 How many types of gametes are produced by a trihybrid?

A 3

B 4

C 8

D 16

View Answer

Answer:4

12 A dihybrid heterozygous tall plant with round seed is crossed with a similar genotype, what percentage of plants should posses Tt Rr genotype?

A 6.25%

B 12.5%

C 25%

D 75%

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Answer: 25%

13 A cross by changing the source of ovum is

A Back cross

B Test cross

C Monohybrid

D Reciprocal cross

View Answer

Answer: Electrical and chemical

14 When the phenotypic and genotypic ratios resemble in the F2 generation it is an example of

A Independent assortment

B Qualitative inheritance

C Segregation

D Incomplete dominance

View Answer

Answer: Qualitative inheritance

15 In what situation, the phenotype of a dihybrid cross would exhibit parental combination of characters in more than the expected value and recombination in less than the expected value?

A When genes are in mitochondria

B When duplicate genes are present

C When genes are linked

D When supplementary genes are present

View Answer

Answer: When genes are in mitochondria

16 When the dihybrid Tt rr plants are self-fertilized, what percentage of descendants would be heterozygous for one character and homozygous for another?

A 25%

B 50%

C 75%

D 100%

View Answer