This quiz works best with JavaScript enabled. Home > Plant > Genetics > Principles Of Genetics – Quiz 17 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 17 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In the F1 generation of a monohybrid cross, the phenotypic ratio would be A) 3:1. B) 1:2:1. C) 2:1:1. D) 1:1:2. Show Answer Correct Answer: A) 3:1. 2. Crosssing over A) Does not occur in humans. B) Is an important factor in increasing variety among sexually reproducing organisms. C) Refers to genes being located close to each other on a single chromosome. D) Linked to obesity. Show Answer Correct Answer: B) Is an important factor in increasing variety among sexually reproducing organisms. 3. Which of the following can be observed in a karyotype? A) A change in a DNA base. B) An extra chromosome. C) Genes. D) Alleles. Show Answer Correct Answer: B) An extra chromosome. 4. Short hair (S) is dominant to long hair (s).What is the genotype for an offspring with long hair? A) SS. B) Ss. C) Ss. D) None of above. Show Answer Correct Answer: B) Ss. 5. In humans mid-digital hair is dominant. What is the genotype of a man who has mid-digital hair, but his mother did not? A) Heterozygous. B) Homozygous Dominant. C) Homozygous Recessive. D) Heterozygous Recessive. Show Answer Correct Answer: A) Heterozygous. 6. The likelihood that a particular event will occur A) Punnett Square. B) Trait. C) Probability. D) Hybrid. Show Answer Correct Answer: C) Probability. 7. Mendel used the principles of ..... to predict what percent of offspring would show a particular trait. A) Purebred. B) Hybrid. C) Dominant. D) Probability. Show Answer Correct Answer: D) Probability. 8. What is the first step in DNA replication? A) Base pairing with DNA polymerase. B) Unzipping the helix with helicase. C) Priming the DNA with primase. D) Putting everything together with ligase. Show Answer Correct Answer: B) Unzipping the helix with helicase. 9. How did Mendel produce the F2 generation of pea plants? A) By self-pollinating two F1 generation plants that had the same traits. B) By cross-pollinating true breeding plants. C) By self-pollinating true breeding plants. D) By self-pollinating two F1 generation plants that had different traits. Show Answer Correct Answer: A) By self-pollinating two F1 generation plants that had the same traits. 10. In the Punnett square shown in Figure 11-1, which of the following is true about the offspring resulting from the cross? A) About three fourths are expected to be tall. B) About half are expected to be short. C) All are expected to be short. D) All are expected to be tall. Show Answer Correct Answer: D) All are expected to be tall. 11. Which of these is due entirely to inheritance in humans? A) Eye color. B) Endurance. C) Reading skill. D) Broken bones. Show Answer Correct Answer: A) Eye color. 12. Unit of inheritance is called A) Genotype. B) Phenotype. C) Gene. D) Chromosome. Show Answer Correct Answer: C) Gene. 13. Which term means two copies of chromosomes (2N)? A) Diploid. B) Haploid. C) Chromosomes. D) Gene. Show Answer Correct Answer: A) Diploid. 14. Error in meiosis in which the homologous chromosomes fail to separate properly A) Nondisjunction. B) Karyotype. C) Restriction Enzyme. D) Gel Electrophoresis. Show Answer Correct Answer: A) Nondisjunction. 15. When forming sex cells, the paired alleles separate so that each egg or sperm only carries one form of the allele A) Principle of independent assortment. B) Principle of segregation. C) Law of dominance. D) Law of recessiveness. Show Answer Correct Answer: B) Principle of segregation. 16. Mendels principles of genetics apply to A) Plants only. B) Animals only. C) Pea plants only. D) All organism. Show Answer Correct Answer: D) All organism. 17. For any particular trait, the pair of alleles of each parent separate and only one allele from each parent passes to an offspring is Mendel's principle of: A) Independent assortment. B) Hybridization. C) Segregation. D) None of above. Show Answer Correct Answer: C) Segregation. 18. The physical appearance of a trait is known as the- A) Genotype. B) Phenotype. C) Characteristics. D) Intelligence. Show Answer Correct Answer: B) Phenotype. 19. The process of deliberately manipulating the genes in an organism in ways other than natural processes is called ..... A) Genetic engineering. B) Genetic drift. C) Genetic swap. D) Natural selection. Show Answer Correct Answer: A) Genetic engineering. 20. Identify the heterozygous dominant genotype: A) TT. B) Tt. C) Tt. D) None of above. Show Answer Correct Answer: B) Tt. ← PreviousNext →Related QuizzesPlant QuizzesPrinciples Of Genetics Quiz 1Principles Of Genetics Quiz 2Principles Of Genetics Quiz 3Principles Of Genetics Quiz 4Principles Of Genetics Quiz 5Principles Of Genetics Quiz 6Principles Of Genetics Quiz 7Principles Of Genetics Quiz 8Principles Of Genetics Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books