This quiz works best with JavaScript enabled. Home > Plant > Genetics > Principles Of Genetics – Quiz 18 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 18 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Principle/Law of Dominance is defined as ..... A) Some alleles are dominant over others. B) Allele pairs separate during gamete formation and randomly unite at fertilization. C) During gamete formation genes for different traits separate without influencing each other's inheritance. D) None of above. Show Answer Correct Answer: A) Some alleles are dominant over others. 2. This type of allele is expressed whether there are one or two copies present. A) Dominant. B) Recessive. C) Homozygous. D) Heterozygous. Show Answer Correct Answer: A) Dominant. 3. Which of the following is an example of a homozygous recessive genotype? A) RR. B) Rr. C) Rr. D) None of above. Show Answer Correct Answer: B) Rr. 4. An organism's genotype is its A) Genetic makeup. B) Physical appearance. C) Feather color. D) Eye color. Show Answer Correct Answer: A) Genetic makeup. 5. Which is an example of codominance? A) A cow with white hairs and a cow with black hairs mate and produce a cow with both white and black hairs. B) A person with blue eyes and a person with brown eyes mate and have a child with brown eyes. C) A sheep with white fur and a sheep with black fur mate and produce a sheep with gray fur. D) A red-flowered plant and a white-flowered plant mate and produce a pink-flowered plant. Show Answer Correct Answer: A) A cow with white hairs and a cow with black hairs mate and produce a cow with both white and black hairs. 6. If you cross one short-winged fly (ww) with a wild-type fly (WW), what is the probability of getting a short-winged offspring in the F1generation? A) 0%. B) 25%. C) 50%. D) 100%. Show Answer Correct Answer: A) 0%. 7. Which of the following describes the Law of Segregation? A) Alleles separate from each other during formation of gametes. B) Dominant alleles will always be shown if present. C) Recessive alleles will only be seen when here are no dominant alleles. D) Recessive alleles are never inherited. Show Answer Correct Answer: A) Alleles separate from each other during formation of gametes. 8. Females 23rd chromosome pair is A) XY. B) XX. C) YX. D) None of above. Show Answer Correct Answer: B) XX. 9. Who is Gregor Mendel? A) A monk that experimented with plants to study the inheritance of traits. B) A man that cared for plants. C) An animal breeder that studied the inheritance of traits. D) A scientists assistant that helped with the discovery of Genetics. Show Answer Correct Answer: A) A monk that experimented with plants to study the inheritance of traits. 10. If long ears (E) are dominant over short ears (e), what is the phenotype of an organism that has genotype ee? A) Long ears. B) One long ear; one short ear. C) Medium length ears. D) Short ears. Show Answer Correct Answer: D) Short ears. 11. What is an "allele"? A) A specific characteristic that varies from one individual to another. B) The different form of a gene like "T" vs "t". C) Chemical factors that determine phenotypes. D) The offspring of crosses between parents with different traits. Show Answer Correct Answer: B) The different form of a gene like "T" vs "t". 12. The best genome representation for heterozygous A) AA. B) Aa. C) Aa. D) None of above. Show Answer Correct Answer: B) Aa. 13. Asexual reproduction has certain advantages. This sort of reproduction needs only one parent and can occur by budding and fragmentation. What is an advantage of sexual reproduction over asexual reproduction? A) Exact copy of the genes. B) Reproduce quickly. C) Greater genetic variation. D) Finding a mate. Show Answer Correct Answer: C) Greater genetic variation. 14. Meiosis A) Entire set of genetic information that an organism carries in its DNA. B) Structure containing four chromatids that forms during meiosis. C) Process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. D) None of above. Show Answer Correct Answer: C) Process in which the number of chromosomes per cell is cut in half through the separation of homologous chromosomes in a diploid cell. 15. What is a series of events a cell goes through as they grow and divide? A) Cell Division. B) Cell Cycle. C) Cytokinesis. D) Mitosis. Show Answer Correct Answer: B) Cell Cycle. 16. How many alleles does an individual have for each trait? A) 1. B) 2. C) 3. D) 4. Show Answer Correct Answer: B) 2. 17. Cells of organisms must replicate for what purposes? A) Growth. B) Repair of damaged cells. C) Reproduction. D) All of the above. Show Answer Correct Answer: D) All of the above. 18. How many alleles affect blood type? A) 1. B) 10. C) 5. D) 3. Show Answer Correct Answer: D) 3. 19. The Punnett square in Figure 11-2 shows that the gene for pea shape and the gene for pea color A) Have the same alleles. B) Are always homozygous. C) Assort independantly. D) Are linked. Show Answer Correct Answer: C) Assort independantly. 20. Calico cats are female because A) The males die during embryonic development. B) The Y chromosome has a gene blocking orange coloration. C) Only females can have Barr bodies. D) A male inherits only one of the two X-linked genes controlling hair color. Show Answer Correct Answer: D) A male inherits only one of the two X-linked genes controlling hair color. ← 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