This quiz works best with JavaScript enabled. Home > Agriculture > Plant > Genetics > Principles Of Genetics – Quiz 9 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 9 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Homozygous means what A) Two different genes. B) Aa. C) Different. D) Same. Show Answer Correct Answer: D) Same. 2. Another word for homozygous is ..... A) Heterozygous. B) Dominant. C) Hybrid. D) Purebred. Show Answer Correct Answer: D) Purebred. 3. My favorite biology teacher is ..... A) Mrs. Galegor. B) Mrs. Galegor. C) Mrs. Galegor. D) Mrs. Galegor. Show Answer Correct Answer: A) Mrs. Galegor. 4. How many different allele combinations would be found in the gametes produced by a pea plant whose genotype was RrYY? A) 4. B) 8. C) 16. D) 2. Show Answer Correct Answer: D) 2. 5. Which genotype would result in an individual with medium-colored skin? (Hint:Look at the number of dominant vs recessive alleles, not the letter). A) AABBcc. B) AabbCC. C) AaBbcc. D) Aabbcc. Show Answer Correct Answer: B) AabbCC. 6. A short-haired cat has a litter of kittens. Some of the kittens have long hair and some have short. Which of the following statements best explains why some kittens look different from their mother? A) The kittens with long hair received mutated genetic material. B) Some kittens may look different from their mother because they received some traits from their father. C) The kittens with long hair interacted differently with their environment than the kittens with short hair. D) Some kittens may look different from their mother because not all physical traits are inherited through genetic material. Show Answer Correct Answer: B) Some kittens may look different from their mother because they received some traits from their father. 7. The way a trait looks is called ..... A) Phenotype. B) Zelotype. C) Genotype. D) Heterotype. Show Answer Correct Answer: A) Phenotype. 8. What part of a person's body breaks down due to Huntington's Disease? A) White blood cells. B) Nerve cells in the brain. C) Bone marrow. D) Arteries. Show Answer Correct Answer: B) Nerve cells in the brain. 9. Gregor Mendal first crossed P (parent) plants to produce F1 (first filial generation) plants. The F1 generation displayed only the trait of one of the parents. What genetic Principle or Law was displayed in this case? A) Principle of Independent Assortment. B) Principle of Dominance. C) Law of Segregation. D) Law of Probability. Show Answer Correct Answer: B) Principle of Dominance. 10. This type of phenotype is less likely to be prominent in offspring A) Recessive genotype. B) Recessive phenotype. C) Dominant phenotype. D) Dominant genotype. Show Answer Correct Answer: A) Recessive genotype. 11. Flowers can be white, red, or pink. This is an example of what type of inheritance? A) Sex-linked traits. B) Incomplete dominance. C) Complete dominance. D) Codominance. Show Answer Correct Answer: B) Incomplete dominance. 12. Phenotype refers to an organism's ..... A) Parents. B) Genetic code. C) Physical apperance. D) Ratio. Show Answer Correct Answer: C) Physical apperance. 13. Having one dominant and one recessive allele- A) Homozygous. B) Genotype. C) Heterozygous. D) Phenotype. Show Answer Correct Answer: C) Heterozygous. 14. Genes that are located on the same chromosome and that are inherited together are known as ..... A) Gene map. B) Haploid. C) Linked genes. D) Diploid. Show Answer Correct Answer: C) Linked genes. 15. A trait that is not expressed when a dominant allele is present. A) Incomplete Dominant. B) Recessive. C) Co-dominant. D) Dominant. Show Answer Correct Answer: B) Recessive. 16. How many genes are crossed in a dihybrid cross? A) 3. B) 4. C) 2. D) 1. Show Answer Correct Answer: C) 2. 17. Which is NOT true of a hybrid? A) It has a pair of chromosomes. B) Its genotype is homozygous. C) Its genotype is heterozygous. D) It has one recessive allele. Show Answer Correct Answer: B) Its genotype is homozygous. 18. A Mm mouse is crossed with a mm mouse. What genotypes would you expect the offspring to have? A) All Mm. B) All mm. C) Some Mm some mm. D) Some MM, some Mm and some mm. Show Answer Correct Answer: C) Some Mm some mm. 19. Both alleles are lower case and the dominant trait is not expressed at all; Example:ee A) Recessive. B) Dominant. C) Incomplete dominance. D) Law of Independent Assortment. Show Answer Correct Answer: A) Recessive. 20. Which best describes Mendel's law of dominance? (3B1) A) When an organism has two different alleles of the same gene, both genes will be expressed equally in the organism. B) When an organism has two different alleles of the same gene, one of the genes will be expressed and the other will be hidden. C) When an organism has two of the same alleles for a gene, that allele is always dominant. D) When an organism has two of the same alleles for a gene, the stronger of the two genes will be expressed in the organism. Show Answer Correct Answer: B) When an organism has two different alleles of the same gene, one of the genes will be expressed and the other will be hidden. 21. When an organism has two alleles that are the SAME for a trait A) Heterozygous. B) Homozygous. C) Recessive. D) Hybrid. Show Answer Correct Answer: B) Homozygous. 22. What is heredity? A) How different genes and traits are passed down from parents to children. B) How different genes and traits are passed down from children to parents. C) How traits are identical to parents. D) How traits are different between siblings. Show Answer Correct Answer: A) How different genes and traits are passed down from parents to children. 23. Geneticists use ..... to represent ....., the different forms of a gene. A) Numbers ; Alleles. B) Letters ; Factors. C) Letters ; Alleles. D) Numbers ; Factors. Show Answer Correct Answer: C) Letters ; Alleles. 24. Meiosis produces A) Eggs (ova). B) Sperm. C) Gametes. D) All of the above. Show Answer Correct Answer: D) All of the above. 25. If two parents are heterozygous for type A blood, what is the probability that their offspring would have type O blood? A) 25%. B) 75%. C) 100 %. D) 50%. Show Answer Correct Answer: A) 25%. 26. A dihybrid cross between 2 heterozygous parents will typically result in which phenotypic ratio? A) 9:3:3:1. B) 1:2:1. C) 4:4:4:4. D) 3:1. Show Answer Correct Answer: A) 9:3:3:1. 27. Light, Temperature, Time and pH A) Environmental factors. B) Mutagens. C) True breeding. D) Pedigree. Show Answer Correct Answer: A) Environmental factors. 28. What happens between meiosis I and meiosis II that reduces the number of chromosomes? A) Replication occurs twice. B) Metaphase occurs. C) Replication does not occur. D) Crossing-over occurs. Show Answer Correct Answer: C) Replication does not occur. 29. 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. 30. 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. ← PreviousNext →Related QuizzesPlant QuizzesAgriculture 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books