This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 5 Principles Of Inheritance And Variation – Quiz 14 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 14 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Test cross involves A) Crossing between two genotypes with recessive traits. B) Crossing between two F$_{1 }$hybrids. C) Crossing F$_{1 }$hybrid with a double recessive genotype. D) Crossing between two genotypes with dominant traits. Show Answer Correct Answer: C) Crossing F$_{1 }$hybrid with a double recessive genotype. 2. Coat color in cow is an example of A) Multiple alleles. B) Incomplete dominance. C) Co-dominance. D) Supplementary genes. Show Answer Correct Answer: C) Co-dominance. 3. A true breeding plant is A) One that is able to breed on its own. B) Produced due to cross-pollination between unrelated plants. C) Near homozygous and produces offsprings of its own type. D) Always homozygous in its genetic constitution. Show Answer Correct Answer: D) Always homozygous in its genetic constitution. 4. Which of the following shows the characteristics of F1 progeny plants in Mendel's monohybrid cross experiments? A) F1 resembled either one of the parents and the trait of the other parent was not seen. B) F1 did not resemble either of the parents, and was in between the two. C) F1 resembled both the parents. D) None of the above. Show Answer Correct Answer: A) F1 resembled either one of the parents and the trait of the other parent was not seen. 5. What is the probability of production of dwarf offsprings in a cross between two heterozygous tall pea plants? A) Zero. B) 50%. C) 25%. D) 100%. Show Answer Correct Answer: C) 25%. 6. What contributed to Mendel's success? I. Selection of pureline pea varieties. II. Knowledge of history. III. Selecting one character at a time. IV. Statistical analysis and mathematicallogic. Choose the correct option A) I, II, III and IV. B) II and III. C) I, III and IV. D) II, III and IV. Show Answer Correct Answer: C) I, III and IV. 7. The genotype of a plant is AaBb. How many different type of genotype in gametes it can produce? A) One. B) Two. C) Four. D) Eight. Show Answer Correct Answer: C) Four. 8. What is the F1 generation in Mendel's experiments? A) First filial generation. B) Second filial generation. C) Parental generation. D) Offspring generation. Show Answer Correct Answer: A) First filial generation. 9. Sally's genotype is heterozygous. Her genotype is written as ..... A) D D. B) D d. C) D d. D) None of the above. Show Answer Correct Answer: B) D d. 10. Who proposed Chromosomal Theory of inheritance- A) In 1992, Walter Sutton and Theodore Crick. B) In 1902, Walter Sutton and Theodore Boveri. C) In 1902, Walter Sutton and Theodore Crick. D) In 1992, Walter Sutton and Theodore Boveri. Show Answer Correct Answer: B) In 1902, Walter Sutton and Theodore Boveri. 11. In F2 Mendelian population of 100 pea plants, how many are expected to be pure tall? A) 100. B) 75. C) 50. D) 25. Show Answer Correct Answer: D) 25. 12. Depending upon the distance between any two genes which is inversely proportional to the strength of linkage, cross overs will vary from A) 50-100%. B) 0-50%. C) 75-100%. D) 100-150%. Show Answer Correct Answer: B) 0-50%. 13. Which is a sex influenced trait? A) Baldness in man. B) Hairy pinna. C) Porcupine skin in man. D) Colourblindness in man. Show Answer Correct Answer: A) Baldness in man. 14. Insertion or deletion of a single base causes A) Inversion mutation. B) Transition mutation. C) Frame-shift mutation. D) Transversion mutation. Show Answer Correct Answer: C) Frame-shift mutation. 15. Seven different characters selected by Mendel was located on how many chromosomes? A) 7. B) 4. C) 2. D) 1. Show Answer Correct Answer: B) 4. 16. A gene showing codominance has A) Alleles that are recessive to each other. B) Both alleles independently expressed in the heterozygote. C) One allele dominant on the other. D) Alleles tightly linked on the same chromosome. Show Answer Correct Answer: B) Both alleles independently expressed in the heterozygote. 17. Select the correct statements regarding honeybees.(i) The queen bee and the worker bees develop from fertilized eggs and are sexually females.(ii) Males (drones develop parthenogenetically from unfertilized eggs.(iii) Queen bee feeds upon royal jelly and the worker bees feed upon bee bread. A) (i) and (ii) only. B) (ii) and (iii) only. C) (i) and (iii) only. D) (i), (ii) and (iii). Show Answer Correct Answer: D) (i), (ii) and (iii). 18. Life cycle of fruit fly(Drosophila) is- A) 9-10days. B) 12-14 days. C) 3-4 days. D) 4-5 days. Show Answer Correct Answer: B) 12-14 days. 19. Strength of the linkage between the two genes is A) Proportionate to the distance between them. B) Inversely proportionate to the distance between them. C) Depend on the chromosomes. D) Depend upon the size of chromosomes. Show Answer Correct Answer: B) Inversely proportionate to the distance between them. 20. A yellow seeded true breeding plant is crossed with green seeded true breeding plant. F1 plants were yellow seeded showing that allele for yellow seed is A) Heterozygous. B) Dominant. C) Lethal. D) Codominant. Show Answer Correct Answer: B) Dominant. 21. Which one of the following conditions in humans is correctly matched with its chromosomal abnormality/linkage? A) Erythroblastosis fetalis-X-linked. B) Down's syndrome-44 autosomes + XO. C) Klinefelter's syndrome-44 autosomes + XXY. D) Colour blindness-Y-linked. Show Answer Correct Answer: C) Klinefelter's syndrome-44 autosomes + XXY. 22. Genes do not occur in pair in A) Zygote. B) Somatic cell. C) Endosperm cells. D) Gametes. Show Answer Correct Answer: D) Gametes. 23. In XO type of sex determination A) Females produce two different types of gametes. B) Males produce two different types of gametes. C) Females produce gametes with Y chromosome. D) Male produce gametes with Y chromosome. Show Answer Correct Answer: B) Males produce two different types of gametes. 24. What is the ratio of one pair of contrasting character in F2 of a dihybrid ratio. A) 3:1. B) 9:3:3:1. C) 5:3. D) 1:2:2:4:1:2:1:2:1. Show Answer Correct Answer: A) 3:1. 25. In sickle cell anaemia, A) Glutamic acid is replaced by tyrosine. B) Glutamic acid is replaced by phenylalanine. C) Valine is replaced by glutamic acid. D) Glutamic acid is replaced by valine. Show Answer Correct Answer: D) Glutamic acid is replaced by valine. ← PreviousNext →Related QuizzesClass 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 1Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 2Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 3Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 4Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 5Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 6Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 7Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 8Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 9Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books