This quiz works best with JavaScript enabled. Home > Plant > Genetics > Principles Of Genetics – Quiz 15 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 15 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. What happens between meiosis I and meiosis II that reduces the number of chromosomes? A) Crossing-over occurs. B) Replication occurs twice. C) Metaphase occurs. D) Replication does not occur. Show Answer Correct Answer: D) Replication does not occur. 2. Two brown haired parents (B) had a blonde haired child (b). What do the parent's genotypes have to be? A) BB. B) Bb. C) Bb. D) ABCDEFG. Show Answer Correct Answer: B) Bb. 3. A characteristic that an organism can pass on to its offspring through its genes is ..... A) Trait. B) Gene. C) Allele. D) Dominant. Show Answer Correct Answer: A) Trait. 4. Which will most likely cause a gene to mutate? A) Water. B) Radiation. C) Soil. D) None of above. Show Answer Correct Answer: B) Radiation. 5. What kind of allele is Bb? A) Heterozygous. B) Homozygous Dominant. C) Homozygous Recessive. D) None of above. Show Answer Correct Answer: A) Heterozygous. 6. Organisms that have different alleles for a particular trait are said to be A) Hybrid. B) Homozygous. C) Heterzygous. D) Dominant. Show Answer Correct Answer: C) Heterzygous. 7. His work brought about the chromosome theory of heredity A) James Watson. B) Walter Sutton. C) Gregor Mendel. D) None of above. Show Answer Correct Answer: B) Walter Sutton. 8. In snapdragons, Tallness (T) is dominant to dwarfness (t). In a cross between two plants that are heterozygous for this trait, the percent of offspring expected to exhibit dwarfness is A) 25%. B) 100%. C) 50%. D) 0%. Show Answer Correct Answer: A) 25%. 9. The failure of chromosomes to separate during meiosis is called A) Nondisjunction. B) X-chromosome inactivation. C) Turner's syndrome. D) Down syndrome. Show Answer Correct Answer: A) Nondisjunction. 10. In a heterozygous genotype, the ..... allele takes over in the phenotype. A) Recessive. B) Dominant. C) Lower case letter. D) Both. Show Answer Correct Answer: B) Dominant. 11. When more than two alleles for a gene occur (such as blood type in humans) A) Incomplete Dominance. B) Codominance. C) Multiple Alleles. D) Polygenic Traits. Show Answer Correct Answer: C) Multiple Alleles. 12. What is the process by which organisms with certain adaptations survive to pass on their traits to a greater number of offspring? A) Artificial selection. B) Genetic drift. C) Natural selection. D) Population genetics. Show Answer Correct Answer: C) Natural selection. 13. What is the approximate probability that a human offspring will be female? A) 10%. B) 25%. C) 50%. D) 75%. Show Answer Correct Answer: C) 50%. 14. Diploid A) Term used to refer to a cell that contains only a single set of genes. B) Term used to refer to chromosomes in which one set comes from the male parent and one set comes from the female parent. C) Term used to refer to a cell that contains two sets of homologous chromosomes. D) None of above. Show Answer Correct Answer: C) Term used to refer to a cell that contains two sets of homologous chromosomes. 15. What is the probability of producing a tall pea plant from a genetic cross between two hybrid tall pea plants? A) 1/4. B) 2/4. C) 3/4. D) 4/4. Show Answer Correct Answer: C) 3/4. 16. In the human Karyotype, what term is used to describe the pair of chromosomes in each numbered group? A) Homozygous chromosomes. B) Autosomes. C) Homologous chromosomes. D) Autosomes. Show Answer Correct Answer: C) Homologous chromosomes. 17. An organism whose genotype is Tt A) Purebred. B) Hybrid. C) Codominance. D) Polygenic. Show Answer Correct Answer: B) Hybrid. 18. A person has brown hair, brown eyes, and is extremely tall. These characteristics are commonly referred to as what? A) Heredity. B) Genetics. C) Alleles. D) Traits. Show Answer Correct Answer: D) Traits. 19. Two or more genes that interact to produce a single trait A) Polygenic inheritance. B) Purebred. C) Hybrid. D) Dominant. Show Answer Correct Answer: A) Polygenic inheritance. 20. Name the Austrian monk who is considered the Father of Heredity. A) Charles Darwin. B) Gregor Mendel. C) Reginald Punnett. D) Johann Nester. Show Answer Correct Answer: B) Gregor Mendel. ← 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