This quiz works best with JavaScript enabled. Home > Class 12 > Class 12 Biology Chapter 5 Principles Of Inheritance And Variation – Quiz 7 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 7 (25 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What will be possible blood group in children from the parents with B and AB blood groups? A) A, O. B) A, B, AB, O. C) A, B, AB. D) B, O. Show Answer Correct Answer: C) A, B, AB. 2. Which condition depict trisomy condition? A) 2n+1. B) 2n-1. C) 2n+2. D) 2n-2. Show Answer Correct Answer: A) 2n+1. 3. Which of the following is sex linked disorder A) Sickle cell anemia. B) Albinism. C) Harmophillia. D) Phenylketonuria. Show Answer Correct Answer: C) Harmophillia. 4. Multiple alleles are present A) At the same locus of the chromosome. B) On non-sister chromatids. C) On different chromosomes. D) At different loci on the same chromosome. Show Answer Correct Answer: A) At the same locus of the chromosome. 5. WHEN A MAN WITH BLOOD A GETS MARRIED TO A WOMAN WITH BLOOD GROUP B, THEN THEIR FIRST CHILD HAS BLOOD GROUP O.FIND OUT PROBABILITY OF OTHER BLOOD GROUPS THEIR CHILDREN. A) A, B, AB. B) B, O. C) A, O. D) A, AB. Show Answer Correct Answer: A) A, B, AB. 6. In his classic experiments on pea plants, Mendel did not use A) Seed shape. B) Flower position. C) Seed colour. D) Pod length. Show Answer Correct Answer: D) Pod length. 7. If a normal visioned man marries a colour blind woman, the chances are high that their sons will be ..... A) 25% chance of being colour blind. B) Not enough data. C) Normal visioned. D) All colour blind. Show Answer Correct Answer: A) 25% chance of being colour blind. 8. A family of four children have colorblind father and a carrier mother. What will be the number of normal sons? A) 4. B) 3. C) 2. D) 1. Show Answer Correct Answer: D) 1. 9. According to Mendel's principle of segregation, gametes always receive A) One pair factor. B) One quarter of the genes. C) Both one factor of father and one factor of mother. D) Only one factor. Show Answer Correct Answer: D) Only one factor. 10. IF A PEA PLANT WITH GENOTYPE RRYy IS CROSSED WITH ANOTHER PEA PLANT WITH GENOTYPE RrYy THEN FIND OUT THE PHENOTYPIC RATIO OF F1 HYBRIDS. A) 6:3. B) 6:2. C) 1:2:1. D) 9:3:3:1. Show Answer Correct Answer: B) 6:2. 11. Two allelic genes are present on A) Two homologous chromosomes on different locus. B) Two non-homologous chromosomes. C) Same chromosome. D) Two homologous chromosomes on same locus. Show Answer Correct Answer: D) Two homologous chromosomes on same locus. 12. Down's Syndrome is due to- A) Trisomy of 18. B) Trisomy of 21. C) Monosomy of 18. D) Monosomy of 21. Show Answer Correct Answer: B) Trisomy of 21. 13. Monosomic (2N-1) is a condition of Aneuploidy which is seen in A) Down's syndrome. B) Klinifelter's syndrome. C) Turner's syndrome. D) Edward's syndrome. Show Answer Correct Answer: C) Turner's syndrome. 14. In pea plant, a heterozygote for axial flower was outcrossed. In what ratio genotype would segregate? A) 3:1. B) 1:1. C) 100% parental trait. D) 1:2. Show Answer Correct Answer: B) 1:1. 15. Where are the genes for cytoplasmic male sterility in plants located? A) Chloroplast genome. B) Mitochondrial genome. C) Cytosome. D) None of the above. Show Answer Correct Answer: C) Cytosome. 16. Recessive gene for haemophilia lacks A) Cones. B) Melanin. C) Thromboplastin. D) Hepatic enzyme. Show Answer Correct Answer: C) Thromboplastin. 17. Generation of non-parental gene combinations is termed as A) Aneuploidy. B) Recombination. C) Polyploidy. D) Linkage. Show Answer Correct Answer: B) Recombination. 18. The fourth blood group was discovered in the year ..... by Castelle and Sturli A) 1904. B) 1947. C) 1902. D) 2001. Show Answer Correct Answer: C) 1902. 19. In pea plant, white colour flowers appear due to presence of A) Anthocyanin. B) Dominant trait. C) Recessive trait. D) Functional enzyme for flower colour. Show Answer Correct Answer: C) Recessive trait. 20. Law of Segregation A) Every organism has two alleles which separate when gametes are produced. B) Alleles for traits are the same. C) Genes from different traits are inherited independently of one another. D) The allele combination of an organism. Show Answer Correct Answer: A) Every organism has two alleles which separate when gametes are produced. 21. Occasionally, a single gene may express more than one effect. The phenomenon is called A) Multiple allelism. B) Mosaicism. C) Pleiotropy. D) Polygeny. Show Answer Correct Answer: C) Pleiotropy. 22. The geneof sickle cell anemia is inherited by A) Blood cells. B) Bone cells. C) Sex chromosome. D) Autosomes. Show Answer Correct Answer: D) Autosomes. 23. . In this disease, there occurs a failure of chloride ion transport mechanism in cell surface membrane of epithelial cells; sweat of the patient conditions very high level of Na$^{+}$ and Cl$^{-}$ ions. This disease is A) Thalassemia. B) Alzheimer's disease. C) Gaucher's disease. D) Cystic fibrosis. Show Answer Correct Answer: D) Cystic fibrosis. 24. In the F$_{2}$ generation of a mendelian dihybrid cross the number of phenotypes and genotypes are A) Phenotypes-4; genotype-16. B) Phenotypes-9; genotypes-4. C) Phenotypes-4; genotypes-8. D) Phenotypes-4; genotypes-8. Show Answer Correct Answer: C) Phenotypes-4; genotypes-8. 25. Why is hemophilia a disease that is more commonly seen in males? A) Both (2) and (3). B) The disease is Y-linked. C) The disease is X-linked. D) None of the above. Show Answer Correct Answer: C) The disease is X-linked. ← 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 8Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 9Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 10Class 12 Biology Chapter 5 Principles Of Inheritance And Variation Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books