CBSE Class 10 Science Heredity and Evolution MCQs Set A

Question. Which of the following plants did Mendel choose for his experiments?         
(a) Pisum sativum
(b) Hibiscus rosa-sinensis
(c) Mirabilis jalapa
(d) None of these
Answer : A

Question. Which of these is not a part of Darwinism?        
(a) Struggle for existence
(b) Overpopulation
(c) Natural selection
(d) Use and disuse of organs
Answer : D

Question. A section of DNA providing information for one protein is called—
(a) Nucleus
(b) Chromosomes
(c) Trait
(d) Gene
Answer : D

Question. Amongst which of the following animals, sex of the offsprings not genetically determined?
(a) Humans
(b) Snails
(c) Birds
(d) Dogs
Answer : B

Question. Which one of the following gives a survival advantage and thus alters frequency of inherited trait.
(i) natural selection
(ii) genetic drift
(a) only (i) (b) only (ii)
(c) both (i) and (ii)
(d) none of these
Answer : A

Question. Which of the following is a totally impossible outcome of Mendel’s Experiment (cross breeding pure bred tall and short pea plants)
(a) 3 tall 1 short plant
(b) 24 tall and 8 short plants
(c) 8 tall and 0 short plants
(d) 4 tall plants and 1 medium-height plant.
Answer : D

Question. Which of the following is controlled by genes?
(i) Weight of a person
(ii) Height of a person
(a) only 1 (i) (b) only (ii)
(c) both (i) and (ii)
(d) Sometimes (i) and sometimes (ii)
Answer : B

Question. What is the probability that a human progeny will be a boy?
(a) 50%
(b) 56%
(c) 47.34%
(d) It varies
Answer : A

Question. Homologous organs have
(a) Same structure, same function
(b) Different structure, different function
(c) Same structure, different function
(d) Same function, different structure
Answer : C

Question. Who have a perfect pair of sex chromosomes?
(a) Girls only
(b) Boys only
(c) Both girls and boys
(d) It depends on many other factors
Answer : A

Question. Which one of the following is not one of the direct conclusions that can be drawm from Mendel’s experiment?
(a) Only one parental trait is expressed
(b) Two copies of each trait is inherited in sexually reproducing orgainsm
(c) For recessive trait to be expressed, both copies should be identical.
(d) Natural selection can alter frequency of an inherited trait.
Answer : D

Question. Which one is a possible progeny in F2 generation of pure bred tall plant with round seed and short plant with wrinkled seeds?
(a) Tall plant with round seeds
(b) Tall plant with wrinkled seeds
(c) Short plant with round seed
(d) All of the above
Answer : D

Question. Which one of the following is present in the nucleus?
(a) Gene
(b) DNA
(c) Chromosomes
(d) All of these
Answer : D

Question. Analogous organs have
(a) Same structure, same function
(b) Different structure, different function
(c) Same structure, different function
(d) Same function, different structure
Answer : D

Question. How can we know how old fossils are:
(a) Fossils found closer to surface are recent than those found much below
(b) Detecting ratios of isotopes
(c) Studying its characteristics
(d) All of these
Answer : D

Question. With whom we associate theory of evolution?
(a) Charles Darwin
(b) Mendel
(c) Stanley Miller
(d) Harold Urey
Answer : A

Question. The science dealing with heredity and variations is called         
(a) palaeontology
(b) genetics
(c) embryology
(d) phylogeny
Answer : B

Question. The Japanese are genetically the closest to        
(a) Indian schoolboys
(b) chimpanzees
(c) gorillas
(d) monkeys
Answer : A

Question. Which of the following is not one of Mendel’s laws?         
(a) Law of dominance
(b) Law of segregation
(c) Law of independent assortment
(d) Law of incomplete dominance
Answer : D

Question. The hereditary units are stretches of DNA called         
(a) chromosomes
(b) traits
(c) characters
(d) genes
Answer : D

Question. What happened when Mendel crossed two traits of a character (say, tallness and dwarfness) in pea plants?        
(a) Both the traits appeared in equal numbers in F1 .
(b) The offspring showed a blend of the two traits.
(c) Only the dominant trait appeared in F1 .
(d) Only the recessive trait appeared in F1 .
Answer : C

Question. The genetic constitution of an individual organism is called         
(a) its genotype
(b) its phenotype
(c) heredity
(d) gene
Answer : A

Question. The forelimbs of man, cat, bat and whale are        
(a) analogous organs
(b) homologous organs
(c) missing links
(d) fossils
Answer : B

Question. Mendel’s contribution to genetics was the         
(a) principle of mutation
(b) theory of natural selection
(c) law of independent assortment of factors
(d) principle of genetic recombination
Answer : C

Question. Surgically removing tails of mice over several generations do not yield mice without tails.This proves that
(a) Both a and b are correct
(b) Cutting tail does not cause genetic change. So it not inherited.
(c) Acquired characters during ones own life are not inherited.
(d) Neither a nor b is correct
Answer : A