This quiz works best with JavaScript enabled. Home > Plant > Principles Of Genetics – Quiz 36 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 36 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Features such as height, color, shape A) Trait. B) Charateristic. C) Alleles. D) Genetics. Show Answer Correct Answer: B) Charateristic. 2. Select the correct genotype:Homozygous Dominant A) Gg. B) Ff. C) DD. D) Hh. Show Answer Correct Answer: C) DD. 3. The passing on of traits from parents to their offspring A) Heredity. B) Hereditary. C) Genes. D) None of above. Show Answer Correct Answer: A) Heredity. 4. The physical appearance of the allele combination the offspring receives A) Genotype. B) Homozygous. C) Phenotype. D) Dominant. Show Answer Correct Answer: C) Phenotype. 5. Two chromosomes that are similar in size and structure are called A) Homologous chromosomes. B) Homozygous chromatids. C) Sister chromatids. D) Sex chromosomes. Show Answer Correct Answer: A) Homologous chromosomes. 6. Why might potential parents get genetic testing done on themselves before having a baby together? A) Doctors could predict likely mutations leading to extraordinary abilities in the children. B) So they could tell if their potential mate had plastic surgery to improve their looks. C) Genetic testing is not possible in today's medical environment but may be within the next 50 years. D) They could discover if their baby might be born with genetic disorders. Show Answer Correct Answer: D) They could discover if their baby might be born with genetic disorders. 7. How many chromosomes are in a sex cell? A) 46. B) 23. C) 26. D) 43. Show Answer Correct Answer: B) 23. 8. All humans have at least one X gene. Choose the answer below that explains why all humans do NOT have a y gene A) Females pass on only a Y to male offspring. B) Males pass on X genes to all offspring. C) Females pass on X genes to all offspring. D) Males pass on a Y to male offspring and an X to female offspring. Show Answer Correct Answer: D) Males pass on a Y to male offspring and an X to female offspring. 9. Whats a pedigree? A) In genetics a type of family tree that maps the occurrence of a trait in a family. B) A contract. C) Written description of all genes worldwide. D) None of above. Show Answer Correct Answer: A) In genetics a type of family tree that maps the occurrence of a trait in a family. 10. Crossing-over A) Situation in which the phenotypes produced by both alleles are completely expressed. B) Process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. C) Process in which homologous chromosomes exchange portions of their chromatids during meiosis. D) None of above. Show Answer Correct Answer: C) Process in which homologous chromosomes exchange portions of their chromatids during meiosis. 11. Specific characteristic determined by a biological factor A) Trait. B) Gene. C) Allele. D) Hybrid. Show Answer Correct Answer: A) Trait. 12. What is genotypic ratio of incomplete dominance A) 1:2:1. B) 3:1. C) 1:3:1. D) 16:1. Show Answer Correct Answer: A) 1:2:1. 13. How many letters does a genotype contain? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 14. Mark is heterozygous. If B is for brown hair, and b is for blonde hair, what is Mark's phenotype? A) Brown Hair. B) Blonde Hair. C) Brown and Blonde Hair. D) Black Hair. Show Answer Correct Answer: A) Brown Hair. 15. Albinism is due to A) Absence of melanin. B) Absence of vitamins. C) Presence of melanin. D) Absence of hormone. Show Answer Correct Answer: A) Absence of melanin. 16. What determines the genotype of an organism? A) The alleles that are passed from parents to offspring. B) The amount of sleep the organism gets. C) The number of children the organism has. D) The foods the organism eats during its life. Show Answer Correct Answer: A) The alleles that are passed from parents to offspring. 17. A white rose and a red rose produce a pink rose, which type of inheritance does this show? A) Incomplete dominance. B) Codominance. C) Multiple alleles. D) Polygenic inheritance. Show Answer Correct Answer: A) Incomplete dominance. 18. In pea plants, the trait for tall stems is dominant over the trait for short stems. If two heterozygous tall plants are crossed, what percentage of the offspring would be expected to have the same phenotype as the parents? A) 100%. B) 75%. C) 50%. D) 25%. Show Answer Correct Answer: B) 75%. 19. In a pedigree, a square represents a A) Female. B) Adult. C) Male. D) Child. Show Answer Correct Answer: C) Male. 20. An Tt plant crosses with another Tt plant. What geonotypes would expect the offspring to have? A) All TT. B) All Tt. C) Some TT and some Tt. D) Some TT some Tt and some tt. Show Answer Correct Answer: D) Some TT some Tt and some tt. ← 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