This quiz works best with JavaScript enabled. Home > Plant > Principles Of Genetics – Quiz 33 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 33 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which organisms did Mendel use to form his principles on the inheritance of traits? A) Fruit flies. B) Pea plants. C) Four-o'clock flowers. D) Roan cattle. Show Answer Correct Answer: B) Pea plants. 2. Magda is a tall, 11 year old drummer. She has a scar on her right cheek. She is good at swimming. Which of her traits did Magda most likely inherit? A) Height. B) The scar. C) Ability to swim. D) Ability to play drums. Show Answer Correct Answer: A) Height. 3. What is the chance of having a boy instead of a girl? A) 25%. B) 50%. C) 75%. D) 100%. Show Answer Correct Answer: B) 50%. 4. How many recessive alleles for a trait must an organism inherit in order to show that trait? A) 1. B) 23. C) 46. D) 2. Show Answer Correct Answer: D) 2. 5. A phenotype is A) Physical appearance. B) Made-up word for gene. C) Not a word at all. D) Two alleles. Show Answer Correct Answer: A) Physical appearance. 6. What is the pattern when you cross red-flowering camellia and a white-flowering camellia to produce camellias with flowers that are both red and white? A) Incomplete dominance. B) Multiple alleles. C) Polygenic inheritance. D) Codominance. Show Answer Correct Answer: D) Codominance. 7. What do we use pedigrees for? A) To look at families. B) To make determinations about the offspring. C) To track traits in families. D) None of above. Show Answer Correct Answer: C) To track traits in families. 8. How many PAIRS of chromosomes are there in a karyotype A) 23. B) 46. C) 48. D) 24. Show Answer Correct Answer: A) 23. 9. One of the parents of a child has phenylketonuria (PKU), which is caused by recessive alleles. The other parent does not have the PKU alleles. What is the chance that the couple will have a child with phenylketonuria? A) 0%. B) 50%. C) 75%. D) 100%. Show Answer Correct Answer: A) 0%. 10. How many alleles do we inherit? A) Both from father. B) We dont inherit alleles. C) 1 from each parent. D) Both from mother. Show Answer Correct Answer: C) 1 from each parent. 11. An allele that is fully expressed when carried by only one pair of homologous chromosomes ..... A) Recessive. B) Heredity. C) Dominant. D) Allele. Show Answer Correct Answer: C) Dominant. 12. Two different forms of a gene A) Alleles. B) Genotype. C) Genes / DNA. D) Phenotype. Show Answer Correct Answer: A) Alleles. 13. Which of the following factors could lead to variations in the offspring of asexually reproducing organisms? A) Crossing over. B) Fertilization. C) Mutations. D) Independent assortment. Show Answer Correct Answer: C) Mutations. 14. Gamete(sex cells) are produced by the process of A) Mitosis. B) Meiosis. C) Crossing-over. D) Replication. Show Answer Correct Answer: B) Meiosis. 15. Genetics is the study of A) Anatomy. B) Heredity. C) Cardiology. D) All of the above. Show Answer Correct Answer: B) Heredity. 16. If an organisms has 1 dominant and 1 recessive allele (Tt) for a trait it is called A) Heterozygous. B) Same. C) Twins. D) Homozygous. Show Answer Correct Answer: A) Heterozygous. 17. If we cross TT with tt, what is the probability that the offspring will have Tt? A) 0%. B) 50%. C) 75%. D) 100%. Show Answer Correct Answer: D) 100%. 18. What do you get when a black sheep mates with a white sheep. If the wool color is an example of incomplete dominance, the wool color will be? A) White. B) Grey. C) Black and white. D) Black. Show Answer Correct Answer: B) Grey. 19. D = dimples d = no dimples What is the genotype for a homozygous recessive offspring? A) DD. B) Dd. C) Dd. D) None of above. Show Answer Correct Answer: B) Dd. 20. In dragons, large scales (S) are dominant and small scales (s) are recessive. A dragon that is heterozygous for the trait is crossed with a dragon that has small scales. What should be the ratio of large-scaled dragons to small-scaled dragons among the offspring? A) 1:2. B) 1:1. C) 2:1. D) 3:1. Show Answer Correct Answer: B) 1:1. ← PreviousNext →Related 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 9Principles Of Genetics Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books