This quiz works best with JavaScript enabled. Home > Cbse > Class 10 > Science > Heredity And Evolution > Class 10 Science Chapter 9 Heredity And Evolution – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 10 Science Chapter 9 Heredity And Evolution Quiz 7 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which of the following is an example of incomplete dominance? A) A red cow and a white bull have a red and white spotted calf. B) Human ABO blood types. C) A red flowering plant and a white flowering plant have pink flowered offspring. D) A tall plant and a short plant have tall offspring. Show Answer Correct Answer: C) A red flowering plant and a white flowering plant have pink flowered offspring. 2. What is the correct order to make a protein? A) Protein, dna, rna. B) Protein, rna, dna. C) DNA, RNA, Protein. D) RNA, DNA, Protein. Show Answer Correct Answer: C) DNA, RNA, Protein. 3. Evolution is ..... A) A slow change over time that explains how modern organisms came from ancient organisms. B) A slow change over time explains how ancient organisms came from modern organisms. C) All the above. D) None of the above. Show Answer Correct Answer: A) A slow change over time that explains how modern organisms came from ancient organisms. 4. Mendel's concept of segregation implies that the two members of an allelic pair of genes- A) Are segregated in pairs. B) May contaminate one another. C) Are distributed to separate gametes. D) Are linked. Show Answer Correct Answer: C) Are distributed to separate gametes. 5. In peas, yellow pod color is dominant to green pod color. A heterozygous parent is crossed with a homozygous recessive plant. What are the chances that the offspring will have green pods? A) 75%. B) 100%. C) 25%. D) 50%. Show Answer Correct Answer: D) 50%. 6. Which of these is an example of a learned behavior? A) A wolf with thick fur. B) A toddler learning how to read. C) A cleft chin. D) The color of a flower. Show Answer Correct Answer: B) A toddler learning how to read. 7. True or False:The sugar in a nucleotide of DNA is called deoxyribose. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 8. Structures are similar in function but not in structure. A) Embryonic. B) Analogous Structures. C) Homologous. D) Vestigial. Show Answer Correct Answer: B) Analogous Structures. 9. When organisms are better adapted to their environment they will survive and reproduce more successfully than organisms less adapted. This process is called what? A) Selective breeding. B) Natural Selection. C) Cloning. D) Evolution of all species. Show Answer Correct Answer: B) Natural Selection. 10. Which of the following must occur for speciation to happen? A) Reproductive isolation. B) Natural selection. C) Geographical isolation. D) Genetic drift. Show Answer Correct Answer: A) Reproductive isolation. 11. Basic unit of heredity present in chromosome is A) Allele. B) Gene. C) Both. D) None of these. Show Answer Correct Answer: B) Gene. 12. The theory of natural selection was proposed by? A) Hugo de Vries. B) Mendel. C) Charles darwin. D) Lamarck. Show Answer Correct Answer: C) Charles darwin. 13. Which of the following conditions of the zygote will result in the birth of male child? A) Two Y-chromosomes. B) Two X-chromosomes. C) One X-chromosome and one Y-chromosome. D) None of these. Show Answer Correct Answer: C) One X-chromosome and one Y-chromosome. 14. How does genetic variation contribute to evolution? A) Genetic variation is solely caused by environmental factors. B) Genetic variation has no impact on survival rates. C) Genetic variation provides the raw material for natural selection, driving evolution by enabling adaptation to environmental changes. D) Genetic variation leads to the extinction of species. Show Answer Correct Answer: C) Genetic variation provides the raw material for natural selection, driving evolution by enabling adaptation to environmental changes. 15. The process in which populations change over time A) Basketball. B) Natural selection. C) Evolution. D) Mutation. Show Answer Correct Answer: C) Evolution. 16. With whom you can associate theory of evolution? A) Stanley miller. B) Herold. C) Charles Darwin. D) Mendel. Show Answer Correct Answer: C) Charles Darwin. 17. Heredity is the passing of traits from ..... to ..... A) Fungi to protists. B) Predators to prey. C) Parents to offspring. D) Water to rain. Show Answer Correct Answer: C) Parents to offspring. 18. A cross between a tall plant (TT) and short pea plant (tt) resulted in progeny that were all tall plants because A) Tallness is recessive trait. B) Tallness is dominant trait. C) Dwarfness is dominant trait. D) All of these. Show Answer Correct Answer: B) Tallness is dominant trait. 19. If organisms become more alike, what type of evolution occured A) Divergent. B) Mutualism. C) Convergent. D) Co evolution. Show Answer Correct Answer: C) Convergent. 20. The evolution of a new species from an existing species is ..... A) Isolation. B) Genetic variation. C) Speciation. D) Natural selection. Show Answer Correct Answer: C) Speciation. 21. What is the basic unit of heredity? A) DNA. B) RNA. C) Genes. D) None of the above. Show Answer Correct Answer: C) Genes. 22. The phenomenon where individuals of a species exhibit differences in characteristics are called: A) Adaptation. B) Evolution. C) Variation. D) All of the above. Show Answer Correct Answer: C) Variation. 23. Which of the following is NOT a way desert animals have adapted to survive in the desert? A) Thick Fur. B) Are active at night. C) Small size. D) Live in burrows. Show Answer Correct Answer: C) Small size. 24. Branch of Science in which we study, genes, variations and heredity is called as A) Evolution. B) Genetics. C) Biotechnology. D) Zoology. Show Answer Correct Answer: B) Genetics. 25. Male patterned baldness is a recessive sex linked trait. How can a woman have it? A) A woman can have it if she has two alleles for it. B) A woman can have it if her father had it. C) A woman can have it if she has one allele for it. D) A woman can't have male patterned baldness. Show Answer Correct Answer: A) A woman can have it if she has two alleles for it. 26. Write true or false for the following statements:In humans, there are two pairs of sex chromosomes. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 27. Adenine can pair with which of the following nitrogenous bases? A) Cytosine. B) Uracil. C) Thymine. D) Both B & C. Show Answer Correct Answer: D) Both B & C. 28. Identify the correct pair of analogous organs among the following A) The forelimb of man and the forelimb of a frog. B) The wing of a butterfly and the wing of a bat. C) The wing of a bird and the wing of a bat. D) The forelimb of lizard and the forelimb of a frog. Show Answer Correct Answer: C) The wing of a bird and the wing of a bat. 29. How does a deciduous tree survive the cold winter? A) By growing its branches closer to the sun. B) Turning a darker color during the winter. C) Losing its leaves to conserve water and becoming dormant. D) Shrinking in size. Show Answer Correct Answer: C) Losing its leaves to conserve water and becoming dormant. 30. A flash flood carried a raft of Amazon ants away from their original population. There is enough distance between the two groups, that they will never meet in nature again. What type of reproductive barrier is this? A) Behavioral isolation. B) Gametic isolation. C) Temporal isolation. D) Geographic isolation. Show Answer Correct Answer: D) Geographic isolation. 31. Genetic differences between organisms of the same species A) Variation. B) Environment. C) Behavior. D) Adaptation. Show Answer Correct Answer: A) Variation. 32. Which of the following is a acquired traits A) Hair colour. B) Eye colour. C) Weight loss. D) Ear lobe. Show Answer Correct Answer: C) Weight loss. 33. Which of the following is NOT a vestigial structure in humans A) Hair on skin. B) Ear muscle. C) Appendix. D) Coccyx. Show Answer Correct Answer: A) Hair on skin. 34. Where would you find the anti-codon? A) Ribosome. B) MRNA. C) RRNA. D) TRNA. Show Answer Correct Answer: D) TRNA. 35. The sex of a child is determined by which of the following A) The length of the mother's pregnancy. B) The length of time between ovulation and copulation. C) The presence of an X chromosomes in an ovum. D) The presence of a Y chromosomes in a sperm. Show Answer Correct Answer: D) The presence of a Y chromosomes in a sperm. 36. According to fossil records, the horses that lived 50 million years ago were much smaller, weaker and slower than modern horses. Which process is most likely responsible for the changes that have led to the increased size, strength, and speed in horses? A) Migration. B) Commensalism. C) Evolution by natural selection. D) Inbreeding. Show Answer Correct Answer: C) Evolution by natural selection. 37. What is an inherited trait? A) A genetically determined feature that distinguishes a person from others. B) A trait acquired during an individual's lifetime. C) A trait that is common to all individuals. D) A trait that is not influenced by genetics. Show Answer Correct Answer: A) A genetically determined feature that distinguishes a person from others. 38. Links between organisms that show branching pattern of evolutionary relationships are shown by ..... A) Two fossil layers. B) Comparative embryology. C) Phylogenetic trees. D) Living fossils. Show Answer Correct Answer: C) Phylogenetic trees. 39. Two pink colored flowers on crossing resulted in 1 red, 2 pink and 1 white flower progeny. The nature of cross will be:- A) Self Pollination. B) Double Fertilization. C) Cross Fertilization. D) No fertilization. Show Answer Correct Answer: C) Cross Fertilization. 40. What are the two genotypes that show the DOMINANT Phenotype A) GG, gg. B) GG, Gg. C) Gg, gg. D) None of the above. Show Answer Correct Answer: B) GG, Gg. 41. Which one of the following statements is correct?Statement 1:The gene which decides the appearance of an organism even in the presence of an alternative gene is known as a dominant gene.Statement 2:The gene which decides the appearance of an organism even in the presence of an alternative gene is known as a recessive gene. A) Statement 1. B) Statement 2. C) Both statements are correct. D) Both statements are incorrect. Show Answer Correct Answer: A) Statement 1. 42. An allele whose trait only shows up when no dominant allele is present. A) Hidden allele. B) Dominant allele. C) Recessive allele. D) Present allele. Show Answer Correct Answer: C) Recessive allele. 43. In the F1 generation, only recessive traits are expressed A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 44. An organism that has two identical alleles for a trait (purebred) A) Phenotype. B) Genotype. C) Heterozygous. D) Homozygous. Show Answer Correct Answer: D) Homozygous. 45. Who is known as father of genetics A) Darwin. B) Gregor Johann Mendel. C) Watson. D) Lamarck. Show Answer Correct Answer: B) Gregor Johann Mendel. 46. Which of the following is totally impossible outcome of Mendel 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. Show Answer Correct Answer: D) 4 tall plants and 1 medium height plant. 47. Transfer of information from a molecule of DNA TO mRNA is A) Mutation. B) Evolution. C) Translocation. D) Transcription. Show Answer Correct Answer: D) Transcription. 48. In the theory of natural selection, Darwin stated that: A) Natural selection acts on the favourable variations, that appear among the organisms. B) Environment does not play any role in the evolution of the organism. C) Characters acquired during the life of the organism are transmitted to its progeny. D) Variations occur due to change in genetic constitution of organism. Show Answer Correct Answer: A) Natural selection acts on the favourable variations, that appear among the organisms. 49. How do traits get passed from parents to offspring? A) Traits are passed through environmental factors only. B) Traits are passed from parents to offspring through genes inherited from both parents. C) Offspring inherit traits solely from the mother. D) Traits are randomly assigned without genetic influence. Show Answer Correct Answer: B) Traits are passed from parents to offspring through genes inherited from both parents. 50. It states that when certain organs become specially developed as a result of some environmental need. A) Theory of use and disuse. B) Theory of Evolution. C) Theory of need. D) Theory of acquired characteristics. Show Answer Correct Answer: A) Theory of use and disuse. 51. The maleness of a child is determined A) The X chromosome in the zygote. B) The cytoplasm of germ cell which determines the sex. C) Sex is determined by chance. D) The Y chromosome in the zygote. Show Answer Correct Answer: D) The Y chromosome in the zygote. 52. Speciation takes place when variation occurs with A) Gaining weight. B) Geographical isolation. C) Changes due to accident. D) Death of organisms. Show Answer Correct Answer: B) Geographical isolation. 53. A pure dominant pea plant producing round-yellow seeds is crossed with pure recessive pea plant producing wrinkled-green seeds. The number of plants bearing round-green seeds in the 1 F generation of Mendel's experiment is A) 1. B) 0. C) 3. D) 9. Show Answer Correct Answer: B) 0. 54. When all of the organisms of a species have died it is called A) Natural selection. B) Extinction. C) Evolution. D) Adaptation. Show Answer Correct Answer: B) Extinction. 55. Which of these bases does not exist in RNA? A) A. B) T. C) U. D) C. Show Answer Correct Answer: B) T. 56. A person has a disease which is linked with its Y-chromosome. This disease will be inherited to his: A) All children. B) All male children. C) All female children. D) Not inherited to any of the children. Show Answer Correct Answer: B) All male children. 57. ..... is the connecting link between reptiles and mammals A) Peripatus. B) Lungfish. C) Salamander. D) Duck billed platypus. Show Answer Correct Answer: D) Duck billed platypus. 58. Protein synthesized by DNA through RNA is called as ..... A) Transition. B) Internal dogma. C) Transcription. D) Central dogma. Show Answer Correct Answer: D) Central dogma. 59. Example of a homologous organ A) The arm of a human, wing of a bird. B) Wing of an insect, wing of a bird. C) Leg of a dog, leg of a spider. D) None of the above. Show Answer Correct Answer: A) The arm of a human, wing of a bird. 60. New species may be formed if:(i) DNA undergoes significant changes in germ cells(ii) chromosome number changes in the gamete(iii) there is no change in the genetic material(iv) mating does not take place A) (i) and (ii). B) (i) and (iii). C) .(ii) and (iv) and (iv) and (iv). D) (i), (ii) and (iii). Show Answer Correct Answer: A) (i) and (ii). ← PreviousNext →Related QuizzesScience QuizzesClass 10 QuizzesClass 10 Science Chapter 9 Heredity And Evolution Quiz 1Class 10 Science Chapter 9 Heredity And Evolution Quiz 2Class 10 Science Chapter 9 Heredity And Evolution Quiz 3Class 10 Science Chapter 9 Heredity And Evolution Quiz 4Class 10 Science Chapter 9 Heredity And Evolution Quiz 5Class 10 Science Chapter 9 Heredity And Evolution Quiz 6Class 10 Science Chapter 9 Heredity And Evolution Quiz 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books