This quiz works best with JavaScript enabled. Home > Agriculture > Plant > Genetics > Principles Of Genetics – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 8 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In Mendel's experiments, the symbol "gg" represents the ..... recessive genotype for pod color. A) Homologous. B) Homozygous. C) Genomes. D) Heterozygous. Show Answer Correct Answer: B) Homozygous. 2. Purebred is the same meaning as ..... A) Heterozygous. B) Homozygous. C) Hybrid. D) None of above. Show Answer Correct Answer: B) Homozygous. 3. How do recessive alleles work? A) The trait only shows up when there is two of them. B) They always show up. C) They don't. D) None of above. Show Answer Correct Answer: A) The trait only shows up when there is two of them. 4. Whats homozygous? A) The case in which the the heterozygote has a phenotype intermediate between those of the two homozygotes. B) Describes the genotype of a trait for which the two alleles an individual carries are the same. C) In genetics a type of family tree that maps the occurrence of a trait in a family. D) None of above. Show Answer Correct Answer: B) Describes the genotype of a trait for which the two alleles an individual carries are the same. 5. Gregor Mendel's "P" generation consisted of purple flower plants crossed with white flower plants. What were the results of this cross? A) All purple flower offspring. B) All white flower offspring. C) Some purple flowers and some white flowers. D) None of above. Show Answer Correct Answer: A) All purple flower offspring. 6. Gregor Mendel developed all of the following principles (laws) of genetics except A) Principle of Dominance and Recessiveness. B) Principle of Mutation. C) Principle of Independent Assortment. D) Principle of Segregation. Show Answer Correct Answer: B) Principle of Mutation. 7. In both parents contribute i alleles, their child will have which blood type? A) AB. B) O. C) B. D) A. Show Answer Correct Answer: B) O. 8. A woman with type A blood, marries a man with type A blood(his mother had type O blood). Under normal circumstances which genotype could not occur in their children? A) AA. B) AB. C) OO. D) AO. Show Answer Correct Answer: B) AB. 9. Why was Gregor Mendel important for modern genetics A) He was the first man to understand certain patterns of inheritance. B) He was the first person to find out about Karyotypes. C) He was the first man to understand the amino acid chain. D) None of above. Show Answer Correct Answer: A) He was the first man to understand certain patterns of inheritance. 10. Why is crossing over during Prophase I important? A) It purifies the dna to decrease the likelihood of genetic diseases being transferred to offspring. B) It insures the offspring are exactly like the parents creating organisms that are virtually identical to one another in a population. C) The process creates additional chromosomes so the offspring have more chromosomes than the parents and are therefore more likely to survive. D) New combinations of alleles are produced leading to genetic variation in offspring which in essence adds to variation in the population of that species. Show Answer Correct Answer: D) New combinations of alleles are produced leading to genetic variation in offspring which in essence adds to variation in the population of that species. 11. Cystic fibrosis is a recessive genetic disorder that results from a defective gene on chromosome 7. For an individual to have symptoms of this disease, which of the following must be true? (3B2) A) He or she must get a defective gene from either the mother or the father but not from both. B) He or she must get a defective gene from both the mother and the father. C) He or she must get a normal gene from the mother and a defective gene from the father. D) He or she must get a defective gene from the mother and a normal gene from the father. Show Answer Correct Answer: B) He or she must get a defective gene from both the mother and the father. 12. Eggs and sperm are called a zygote when they combine during fertilization. If human sex cells each have 23 chromosomes, how many are there when they form a zygote? A) 11.5. B) 92. C) 23. D) 46. Show Answer Correct Answer: D) 46. 13. A set of genes for one trait ..... One comes from mom and one comes from dad. Always exist as "pairs" ..... A) Genotype. B) Phenotype. C) Gene. D) Alles. Show Answer Correct Answer: D) Alles. 14. Characteristic that is inherited; can be either dominant or recessive A) Genes. B) Allele. C) Chromosome. D) Trait. Show Answer Correct Answer: D) Trait. 15. Which phrase best describes the ending outcome of crossing over? A) Crossing over results in 4 identical cells, resulting in diversity in living things. B) Crossing over results in 4 different gametes, resulting in diversity in living things. C) Crossing over results in 2 identical cells, resulting in diversity in living things. D) Crossing over results in 2 different cells, resulting in diversity in living things. Show Answer Correct Answer: B) Crossing over results in 4 different gametes, resulting in diversity in living things. 16. Which of the following is an example of a heterozygous genotype? A) RR. B) Rr. C) Rr. D) None of above. Show Answer Correct Answer: B) Rr. 17. Gregor Mendel was: A) An English scientist who carried out research with Charles Darwin. B) A little known Central European monk. C) An early 20th century Dutch biologist who carried out genetics research. D) None of above. Show Answer Correct Answer: B) A little known Central European monk. 18. The passing of physical characteristics from parent to offspring is ..... A) Genes. B) Heredity. C) Genetics. D) Traits. Show Answer Correct Answer: B) Heredity. 19. An organism where both alleles for a particular trait are the same A) Recessive. B) Purebred. C) Dominant. D) Hybrid. Show Answer Correct Answer: B) Purebred. 20. ..... is the study of the inheritance of traits and their variations. A) Disruptive Selection. B) Heredity. C) Evolution. D) Genetics. Show Answer Correct Answer: D) Genetics. 21. Both versions of the trait are expressed in the phenotype of the offspring. Which pattern of inheritance best classifies the observed trait? A) Sex-linkage. B) Incomplete dominance. C) Dominance. D) Co-dominance. Show Answer Correct Answer: D) Co-dominance. 22. What are male gametes called and how many are produced? A) Eggs, 1. B) Sperm, 4. C) Sperm, 2. D) Polar body, 3. Show Answer Correct Answer: B) Sperm, 4. 23. In each case where Mendel crossed true-breeding plants as parents, the offspring displayed only one of the traits seen in the parents. This observation supports which principle of genetics? A) Segregation. B) Independent assortment. C) Dominance and recessiveness. D) Allele frequency. Show Answer Correct Answer: C) Dominance and recessiveness. 24. Name the pattern:a gene has more than two possible alleles A) Incomplete dominance. B) Multiple alleles. C) Polygenic inheritance. D) Codominance. Show Answer Correct Answer: B) Multiple alleles. 25. What does the notation TT represent? A) Two dominant alleles. B) Two recessive alleles. C) A hybrid. D) Heterozygous recessive. Show Answer Correct Answer: A) Two dominant alleles. 26. When two identical alleles for a trait are in an organism, the organism is said to be .....? A) Heterozygous. B) Homozygous. C) Allele. D) Resseive. Show Answer Correct Answer: B) Homozygous. 27. The different forms of a gene are called A) Traits. B) Pollinations. C) Alleles. D) Hybrids. Show Answer Correct Answer: C) Alleles. 28. Gregor Mendel was born in what country A) Austraila. B) Alaska. C) Africa. D) Austria. Show Answer Correct Answer: D) Austria. 29. When animal cells divide, they follow a specific sequence of events. Which event happens during mitosis of an animal cell? A) The cell grows larger in size to prepare for duplication. B) The cell replicates its DNA, which results in the formation of chromosomes. C) The cell divides its nucleus into two new nuclei. D) The cell produces structures, such as centrioles, to help with the division. Show Answer Correct Answer: C) The cell divides its nucleus into two new nuclei. 30. When traits are controlled by two or more genes (such as skin color) A) Incomplete Dominance. B) Codominance. C) Multiple Alleles. D) Polygenic Traits. Show Answer Correct Answer: D) Polygenic Traits. ← 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 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books