This quiz works best with JavaScript enabled. Home > Plant > Principles Of Genetics – Quiz 8 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 8 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When a red and white individual produce pink offspring it is called: A) Codominance. B) Multiple alleles. C) Incomplete dominance. D) Epistasis. Show Answer Correct Answer: C) Incomplete dominance. 2. Which of the following genetic screening techniques is BEST used to see if someone has trisomy #2? A) Karyotype. B) Punnett square. C) Gel electrophoresis. D) Pedigree. Show Answer Correct Answer: A) Karyotype. 3. When Gregor Mendel crossed true-breeding tall plants (TT) with true-breeding short plants (tt), all the offspring were tall because A) The allele for tall plants is recessive. B) The allele for short plants is dominant. C) The allele for tall plants is dominant. D) None of above. Show Answer Correct Answer: C) The allele for tall plants is dominant. 4. Whats an Allele? A) An individual who carries one allele for a recessive trait and does not exhibit the trait. B) The genes that an organism carries for a particular trait. C) Alternative versions of a gene. D) Manifested structure, functions, and behaviors of an individual. Show Answer Correct Answer: C) Alternative versions of a gene. 5. What is the process by which the number of chromosomes per cell is cut in half through a process of separating homologous chromosomes? A) Meiosis. B) Crossing-over. C) Replication. D) Mitosis. Show Answer Correct Answer: A) Meiosis. 6. What are the genotypes for type A blood? A) AA, O. B) IAIA, IAi. C) AO, O. D) OO, AA. Show Answer Correct Answer: B) IAIA, IAi. 7. Principle/Law of Segregation 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: B) Allele pairs separate during gamete formation and randomly unite at fertilization. 8. Dominant alleles are represented by a(n) A) Phenotype. B) Lower case letter. C) Upper case letter. D) Punnett square. Show Answer Correct Answer: C) Upper case letter. 9. Mendel ..... pea plants to study traits. A) Cut. B) Naturally pollinated. C) Crossed. D) None of above. Show Answer Correct Answer: C) Crossed. 10. An assumption, an idea that is proposed for the sake of argument so that it can be tested to see if it might be true A) Law. B) Theory. C) Hypothesis. D) Evidence. Show Answer Correct Answer: C) Hypothesis. 11. What does heterozygous mean? A) An organism that has the same genes for a trait (TT or tt). B) An organism that has different genes for a trait (Tt). C) When neither gene is fully dominant; offspring is a mixture of both. D) The different forms of a trait (hair color$\rightarrow$ brown, blonde, red. Show Answer Correct Answer: B) An organism that has different genes for a trait (Tt). 12. In Andalusian fowls, black individuals (BB) and white individuals (bb) are homozygous. Heterozygous individuals are grey (Bb). What is the genotype ratio for a cross between a grey fowl and a white fowl? A) 2 BB:2 Bb:0 bb. B) 0 BB:4 Bb:0 bb. C) 0 BB:2 Bb:2 b. D) 1 BB:2 Bb:1 bb. Show Answer Correct Answer: C) 0 BB:2 Bb:2 b. 13. G = green, g = yellowThe genotype for a yellow plant is ..... A) GG. B) Gg. C) Gg. D) All of the choices result in yellow. Show Answer Correct Answer: B) Gg. 14. If you crossed two heterozygous plants, how many of the offspring will also be heterozygous? A) All. B) Half. C) 3/4. D) 1/4. Show Answer Correct Answer: B) Half. 15. In a pedigree, a SQUARE represents a(an) A) Male. B) Female. C) Child. D) Adult. Show Answer Correct Answer: A) Male. 16. Cross Two Homozygous plants ( RRYY x rryy ) R = round seeds, r = wrinkled seeds Y = yellow seeds, y = green seeds What percent will have Round and Yellow seeds? A) 0%. B) 25%. C) 50%. D) 100%. Show Answer Correct Answer: D) 100%. 17. Which of the following is an example of codominance? A) A pink snapdragon flower color. B) Crossing a tall plant and a short plant to make a medium plant. C) Crossing a pea plant with round seeds and a pea plant with wrinkled seeds to produce a pea plant with round seeds. D) Crossing a white horse and a black horse to produce a horse with both black hairs and white hairs. Show Answer Correct Answer: D) Crossing a white horse and a black horse to produce a horse with both black hairs and white hairs. 18. Malaria is a disease caused by a A) Gene mutation. B) Defect in red blood cells. C) Bacterium found in water. D) Parasite carried by mosquitoes. Show Answer Correct Answer: D) Parasite carried by mosquitoes. 19. What is the end result of meiosis? A) 2 genetically identical diploid somatic cells. B) 2 genetically different haploid somatic cells. C) 4 genetically identical diploid gametes. D) 4 genetically different haploid gametes. Show Answer Correct Answer: D) 4 genetically different haploid gametes. 20. What must happen before meiosis can begin? A) The cell splits into four parts. B) DNA must duplicate four times. C) The chromosomes must replicate. D) Four haploid cells are produced. Show Answer Correct Answer: D) Four haploid cells are produced. ← 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 9Principles Of Genetics Quiz 10Principles Of Genetics Quiz 11 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books