Heredity and Evolution MCQs | Heredity and Evolution Multiple Choice Questions and Answers

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Questions
1 Exchange of genetic material takes place in
A Vegetative reproduction
B Asexual reproduction
C Sexual reproduction
D Budding

Answer: Sexual reproduction
2 A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because
A Tallness is the dominant trait
B Shortness is the dominant trait
C Tallness is the recessive trait
D Height of pea plant is not governed by gene 'T' or 't'

Answer: Tallness is the dominant trait
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3 Which of the following statement is incorrect?
A For every hormone there is a gene
B For every protein there is a gene
C For production of every enzyme there is a gene
D For every molecule of fat there is a gene

Answer: For every molecule of fat there is a gene
4 The maleness of a child is determined by
A The X-chromosome in the zygote
B The Y-chromosome in zygote
C The cytoplasm of germ cell which determines the sex
D Sex is determined by chance

Answer: The Y-chromosome in zygote
5 Select the incorrect statement
A Frequency of certain genes in a population change over several generations resulting in evolution
B Reduction in weight of the organism due to starvation is genetically controlled
C Low weight parents can have heavy weight progeny
D Traits which are not inherited over generations do not cause evolution

Answer: Reduction in weight of the organism due to starvation is genetically controlled
6 A basket of vegetables contains carrot, potato, radish and tomato. Which of them represent the correct homologous structures?
A Carrot and potato
B Carrot and tomato
C Radish and carrot
D Radish and potato

Answer: Radish and carrot
7 Select the correct statement
A Tendril of a pea plant and phylloclade of Opuntia are homologous
B Tendril of a pea plant and phylloclade of Opuntia are analogous
C Wings of birds and limbs of lizards are analogous
D Wings of bird and wings of bat are homologous

Answer: Wings of bird and wings of bat are homologous
8 A trait in an organism is influenced by
A Paternal DNA only
B Maternal DNA only
C Both maternal and paternal DNA
D Neither by paternal nor by maternal DNA

Answer: Both maternal and paternal DNA
9 According to the evolutionary theory, formation of a new species is generally due to
A Sudden creation by nature
B Accumulation of variations over several generations
C Clones formed during asexual reproduction
D Movement of individuals from one habitat to another

Answer: Accumulation of variations over several generations
10 From the list given below, select the character which can be acquired but not inherited
A Colour of eye
B Colour of skin
C Size of body
D Nature of hair

Answer: Size of body
11 In peas, a pure tall plant (TT) is crossed with a short plant (tt). The ratio of pure tall plants to short plants in F2 is
A 1 : 3
B 3 : 1
C 1 : 1
D 2:1

Answer: 3 : 1
12 The theory of evolution of species by natural selection was given by
A Mendel
B Darwin
C Morgan
D Lamarck

Answer: Darwin
13 Some dinosaurs had feathers although they could not fly but birds have feathers that help them to fly. In the context of evolution this means that
A Reptiles have evolved from birds
B There is no evolutionary connection between reptiles and birds
C Birds have evolved from reptiles
D None of the above

Answer: Birds have evolved from reptiles
14 Which of the following best expresses the concept of the word ‘allele’?
A Genes for wrinkled and yellow
B Genes for wrinkled and round
C phenotypes
D the expression of agene

Answer: Genes for wrinkled and round
15 The inheritance of skin colour in humans is an example of which of the following?
A Epistasis
B Gene linkage
C polygeneic inheritance
D codominance

Answer: polygeneic inheritance
16 Which of the following gives information about the phenotype but not the genotype?
A XHY
B Hemophiliac man
C Tall pea plant
D None of the above

Answer: Tall pea plant
17 An example of a genotype is:
A A tall pea plant
B R and r
C TtHH
D Hemophiliac

Answer: TtHH
18 A pedigree chart shows:
A The genotypic ratios of the offspring
B The types of gametes produced by the parents
C The pattern of inheritance of a specific gene
D Which genes are co-dominant

Answer: The pattern of inheritance of a specific gene
19 Mendel discovered principles of inheritance because he:
A Observed simultaneously all of the many characteristics in which the parents differed
B Believed that the hereditary characteristics of two individuals became thoroughly blended in the offspring
C Ignored all characteristics except a few markedly contrasting ones in which he studied
D Studied only the offspring obtained from a single mating

Answer: Ignored all characteristics except a few markedly contrasting ones in which he studied
20 An example of alleles is:
A AB and Tt
B TT and Tt
C T and t
D X and Y

Answer: T and t

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