This quiz works best with JavaScript enabled. Home > Agriculture > Plant > Genetics > Principles Of Genetics – Quiz 19 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 19 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which statement is true of Y chromosomes? A) Only men have them. B) Only women have them. C) Women have two of them. D) All babies have them. Show Answer Correct Answer: A) Only men have them. 2. A male and female bison that are both heterozygous for normal skin pigmentation (Aa) produce an albino offspring (aa). Which of Mendels principles exlain(s) why the offspring is albine? A) Dominance only. B) Dominance and segregation. C) Independent assortment only. D) Segregation only. Show Answer Correct Answer: C) Independent assortment only. 3. Which of the following is not an environmental factor that affects gene expression? A) Sound waves. B) Time of year. C) Ph/ acidity of soil. D) Temperature. Show Answer Correct Answer: A) Sound waves. 4. Which is an example of incomplete dominance? A) Two white cats having black kittens. B) A white cat and a black cat having grey kittens. C) A white cat and a black cat having white kittens. D) A grey cat and a black cat having black kittens. Show Answer Correct Answer: B) A white cat and a black cat having grey kittens. 5. The letters that represent the different types of alleles A) Phenotype. B) Genotype. C) Plygenic. D) Alleles. Show Answer Correct Answer: B) Genotype. 6. What is NOT a possible genotype for someone with type B blood? A) BB. B) AB. C) BO. D) None of above. Show Answer Correct Answer: B) AB. 7. Gregor Mendel used pea plants to study heredity for all of the following reasons EXCEPT A) That it was relatively easy to cross different pea plants in order to observe the resulting offspring. B) That their characters, like pod color and height, were east to observe. C) That the characters Mendel studied had at least two identifiable traits. D) That many characters such as pod color and seed shape were controlled by a dozen or more interacting genes. Show Answer Correct Answer: D) That many characters such as pod color and seed shape were controlled by a dozen or more interacting genes. 8. Which human trait is controlled by polygenic inheritance? A) Blood type. B) Eye color. C) Earlobe position. D) Thumb shape. Show Answer Correct Answer: B) Eye color. 9. Blue (B) is dominant over tan (b). If Bb were crossed with BB, what percent of the progeny will be tan? A) 50%. B) 75%. C) 0%. D) 100%. Show Answer Correct Answer: C) 0%. 10. When two or more characteristics are inherited, and the genes are located on separate chromosomes, then they are inherited independently of each other A) Dominance. B) Unit inheritance. C) Independent assortment. D) Segregation. Show Answer Correct Answer: C) Independent assortment. 11. Which is true of an offspring with incomplete dominance? A) Every offspring shows the dominant phenotype. B) Offspring phenotype is a combination of the parents' phenotypes. C) Multiple genes determine its phenotype. D) Both alleles can be observed in its phenotype. Show Answer Correct Answer: B) Offspring phenotype is a combination of the parents' phenotypes. 12. Most sex-linked genes are located on A) The autosomes. B) The X chromosome only. C) The Y chromosome only. D) Both the X chromosome and the Y chromosome. Show Answer Correct Answer: B) The X chromosome only. 13. The allele that is hidden by another form A) Phenotype. B) Dominant. C) Recessive. D) Genotype. Show Answer Correct Answer: C) Recessive. 14. What is the definition of Heterozygous? A) When an individual has two sets of the same allele. B) When it is neither dominant or recessive. C) A pair of genes where one is dominant and one is recessive. D) None of above. Show Answer Correct Answer: C) A pair of genes where one is dominant and one is recessive. 15. What organism did Thomas Hunt Morgan use for his genetic studies? A) Himalayan rabbits. B) Speckled chickens. C) Fruit fly (aka Drosphila). D) Four o'clock flowers. Show Answer Correct Answer: C) Fruit fly (aka Drosphila). 16. Which pair of alleles shown below are both DOMINANT ALLELES? A) Aa. B) AA. C) Aa. D) None of above. Show Answer Correct Answer: B) AA. 17. What is a gamete? A) Two sets of sister chromatids. B) A diploid cell that split during meiosis. C) Two chromosomes that are identical. D) A sperm or egg cell produced by meiosis. Show Answer Correct Answer: D) A sperm or egg cell produced by meiosis. 18. Ella and Olivia are sisters. Both sisters are taller than average, but each sister has specific traits the other sister does not. Ella is a competitive swimmer who trains outside in the summer. Her hair is bleached blond by the sun and by chlorine in the pool water. Her many hours of practice have made her fit and muscular.Olivia loves to help people and wants to become a nurse someday. She volunteers every week at the nursing home where her great-grandmother lives. She walks the residents to and from their daily activities, and in the evening during dinner, she play the piano beautifully for them.Which of the following traits is inherited? A) Height. B) Sun-bleached hair. C) Strong muscles. D) Piano skills. Show Answer Correct Answer: A) Height. 19. Albinism is a recessive disease. In a cross between two parents with normal coloration (Aa X Aa), what percent chance of the offspring being an albino? A) 25%. B) 0%. C) 100%. D) 50%. Show Answer Correct Answer: A) 25%. 20. What is Mendel's law of segregation? A) Principle that during the formation of gametes two alleles for the genes separate so that half the the gametes carry on allele. B) The principle that allele pairs for different genes separate independently in meiosis, so the inheritance of one trait generally does not influence the inheritance of another trait. C) The principle that a trait is determined by instructions on one gene only. D) None of above. Show Answer Correct Answer: A) Principle that during the formation of gametes two alleles for the genes separate so that half the the gametes carry on allele. 21. What is the chromosome theory of inheritance? A) Chromosomes are carried from parent to offspring on hybrids. B) Genes are carried from parents to offspring on chromosomes. C) Hybrid pairs of chromosomes combine to form offspring. D) Codominant genes combine to form new allele based heterozygous offspring. Show Answer Correct Answer: B) Genes are carried from parents to offspring on chromosomes. 22. What do you call the physical expression of a gene? A) Genotype. B) Dominant. C) Phenotype. D) Allele. Show Answer Correct Answer: C) Phenotype. 23. The study of how traits are passed from one generation to the next is called the science of ..... A) Genotypes. B) Incomplete dominance. C) Phenotypes. D) Heredity. Show Answer Correct Answer: D) Heredity. 24. A trait that is expressed over other traits. A) Co-dominant. B) Incomplete Dominant. C) Recessive. D) Dominant. Show Answer Correct Answer: D) Dominant. 25. The description of an observed phenomenon. It doesn't explain why the phenomenon exists or what causes it A) Law. B) Hypothesis. C) Evidence. D) Theory. Show Answer Correct Answer: A) Law. 26. The alleles for round (R) and yellow (Y) are ..... over the alleles for wrinkled (r) and green (y). A) Recessive. B) Polygenic. C) Dominant. D) Codominant. Show Answer Correct Answer: C) Dominant. 27. A kitten has spots and stripes. The mother has stripes and the father has spots. Which law of inheritance does this show? A) Incomplete dominance. B) Codominance. C) Multiple alleles. D) Polygenic inheritance. Show Answer Correct Answer: B) Codominance. 28. What is the cure for Tay Sachs? A) No cure yet. B) Nervous system therapy. C) Surgery to the cerebral cortex to rewire the nerves of the brain to stop Tay Sachs from occurring and causing further damage. D) Removal of the spine. Show Answer Correct Answer: A) No cure yet. 29. Snap dragon color is a incomplete dominant trait. A red flower (RR) is crossed with white flower (rr)? What color are flowers that are Rr? A) Red. B) Red and White. C) White. D) Pink. Show Answer Correct Answer: D) Pink. 30. A cross between purebred peas with inflated pods and purebred peas with pinched pods resulted in peas with all inflated pods. What is the recessive trait? A) Pinched pods. B) Pod shape. C) Inflated pods. D) Hybrids. Show Answer Correct Answer: A) Pinched pods. ← 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 8 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books