Title 9 Heredity and Evolution - MCQs.pdf ✅

© www.bankofbiology.com 8921 510 476 1 9. HEREDITY AND EVOLUTION – MCQs ACCUMULATION OF VARIATION DURING REPRODUCTION 1. The transmission of characters from parents to offspring is called a) Evolution b) Heredity (inheritance) c) Variation d) Dominance Answer: b) Heredity (inheritance) 2. In asexual reproduction, the resultant individuals get only very minor differences due to a) Small inaccuracies in DNA copying b) Genetic recombination c) Crossing over d) Meiosis Answer: d) Small inaccuracies in DNA copying 3. Assertion: Variation is high in sexually reproducing organisms compared to asexually reproducing organisms. Reason: Inaccuracies during DNA copying give rise to variation. a) Both A and R are true and R is the correct explanation of A. b) Both A and R are true but R is not the correct explanation of A. c) A is true but R is false. d) A is false but R is true. Answer: c) A is true but R is false. 4. The basis of evolution is a) Elimination of all genetic variations. b) Random accumulation of harmful mutations. c) Selection of variants by environmental factors. d) Lack of changes in the genetic material. Answer: c) HEREDITY 5. Which is true statement? a) Free ear lobe and attached ear lobe are dominant. b) Free ear lobe and attached ear lobe are recessive. c) Free ear lobe is dominant and attached ear lobe is recessive. d) Attached ear lobe is dominant and free ear lobe is recessive. Answer: c) 6. Which is true statement? a) Father contributes more amounts of genetic material to the child. b) Father contributes more genetic material to the male child. c) Mother contributes more amounts of genetic material to the female child. d) Father and mother contribute equal amounts of genetic material to the child. Answer: d) 7. Which of the following scientist gave the principles of inheritance? a) Gregor Mendel b) Friedrich Griffith c) Johannes d) Watson and Crick Answer: a) Gregor Mendel 8. Of the following contrasting characters of garden peas, which one is not selected by Mendel? a) round/wrinkled seeds b) tall/short plants c) white/violet flowers d) large/small seeds Answer: d) large/small seeds 9. Mendel crossed a tall pea plant & a short pea plant. The first generation (F1 progeny) was a) all plants tall b) all plants short c) 50% tall, 50% short d) 75% tall, 25% short Answer: a) all plants tall 9. The expressed trait is called a) Recessive b) Dominant c) Genotype d) Phenotype Answer: b) Dominant 10. Mendel allowed F1 tall plants to reproduce by self- pollination. The second-generation (F2) progeny was a) 50% tall and 50% short. b) 75% tall and one quarter (25%) short. c) 100% tall. d) 100% intermediate height. Answer: b) 75% tall and one quarter (25%) short. 11. Mendel proposed that every character is controlled by a) one factor b) two factors c) one chromosome d) two chromosomes Answer: b) two factors 12. What does the progeny of a tall plant with round seeds and a short plant with wrinkled seeds look like? a) All are tall with round seeds. b) All are short with round seeds. c) All are tall with wrinkled seeds. d) All are short with wrinkled seeds.