This quiz works best with JavaScript enabled. Home > Science > Biology > Genetic And Mendel S Law Of Heredity – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Genetic And Mendel S Law Of Heredity Quiz 3 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. A gene which fails to express in the presence of non-allelic genes is. A) Hypostasis. B) Pleotropy. C) Aneuploidy. D) Mutation. Show Answer Correct Answer: A) Hypostasis. 2. A colur blind man is married to a normal visioned woman whose parents also had normal vision What proportion of their Children is likely to be colour blind? A) 0 percent. B) 25 percent. C) 50 percent. D) 100 percent. Show Answer Correct Answer: A) 0 percent. 3. What is epistasis? A) The gene which masks the effect of non-allelic gene. B) An undesirable defective gene. C) The gene which fails to express itself in the presence of non allelic genes. D) All of above. Show Answer Correct Answer: A) The gene which masks the effect of non-allelic gene. 4. One inherited haploid set of chromosomes is called. A) Genome. B) Chromomere. C) Karyotype. D) None of the above. Show Answer Correct Answer: A) Genome. 5. Which fungus was of great use in finding out genetic principles? A) Mucor. B) Neurospore. C) Agaricus. D) Penicillium. Show Answer Correct Answer: B) Neurospore. 6. Eugenics is the application of genetics to improve. A) Crop plants. B) Fruit trees. C) Cattle. D) Human beings. Show Answer Correct Answer: D) Human beings. 7. An inherited characteristic which does not appear in one generation but can appear in the next is called. A) Dominant. B) Recessive. C) Homozygous. D) Heterozygous. Show Answer Correct Answer: B) Recessive. 8. A white woman marries a black man.They have four children-2 sons and 2 daughters What proportion of these children is likely to be black? A) 25%. B) 50%. C) 100%. D) None. Show Answer Correct Answer: D) None. 9. How many alleles in a given gene are possible? A) 2. B) 4. C) 3. D) Any number. Show Answer Correct Answer: D) Any number. 10. What are oncogenes? A) Dominant genes. B) A set of genes which produce cancer. C) Genes present in the X chromosomes causing haemophilia. D) Recessive genes. Show Answer Correct Answer: B) A set of genes which produce cancer. 11. The suggestion that the chromosomes are the carriers of hereditary material was first made by. A) Johannson. B) Flemming. C) Sutton and Boveri. D) Morgan. Show Answer Correct Answer: C) Sutton and Boveri. 12. Phenotype? A) I dont know. B) Banananananananananananana. C) Describes the way an organism looks and behaves. D) Describes the way a rock looks and behaves. Show Answer Correct Answer: C) Describes the way an organism looks and behaves. 13. In human beings, sex is determined by the sex chromosomes X and Y. What would, then be the genetic constitution of a normal woman? A) XO. B) XX. C) XY. D) YY. Show Answer Correct Answer: B) XX. 14. Mutation is. A) A factor responsible for plant growth. B) A change which affects the offsprings F2 generation only. C) A change that is inherited. D) A change which affects the parents only but is never inherited. Show Answer Correct Answer: C) A change that is inherited. 15. Rate of mutation can be increased by. A) Hormones. B) I.A.A. C) Radiation. D) Grafting. Show Answer Correct Answer: C) Radiation. 16. Normal monohybrid cross yields in the F2 generation, a ratio of 3:1 In some cases the ratio is found to be 2:1 Itis due to. A) Mistake in crossing. B) Incomplete dominance. C) Lethal genes. D) Recessive genes. Show Answer Correct Answer: C) Lethal genes. 17. Body cells infected with virus produce a protein called. A) Interferon. B) Properdin. C) Gamma globulin. D) Hybridoma. Show Answer Correct Answer: A) Interferon. 18. A colour blind person commonly has difficulty in seeing. A) All colours. B) Red only. C) Red, green and pale tints. D) Violet and blue. Show Answer Correct Answer: C) Red, green and pale tints. 19. Who coined the term gene? A) Mendel. B) Hugo De Vries. C) Jacob and Mendel. D) Johannson. Show Answer Correct Answer: D) Johannson. 20. In which one of the following is sex determined by environment? A) Bonnelia. B) Honeybee. C) Maize. D) Papaya. Show Answer Correct Answer: A) Bonnelia. ← PreviousNext →Related QuizzesScience QuizzesGenetic And Mendel S Law Of Heredity Quiz 1Genetic And Mendel S Law Of Heredity Quiz 2Genetic And Mendel S Law Of Heredity Quiz 4Genetic And Mendel S Law Of Heredity Quiz 5Biological Sciences QuizBiology QuizBotany QuizCell Biology QuizCirculatory System QuizEndocrine Glands QuizHuman Body And Reproduction QuizHuman Physiology Anatomy QuizNervous System QuizPlant Kingdom QuizRespiration QuizScientific Names Of Plants And Animals QuizSkeletal System QuizVirus And Bacteria QuizVitamins Minerals Coenzymes And Deficiency Diseases QuizZoology Quiz 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books