This quiz works best with JavaScript enabled. Home > Agriculture > Plant > Genetics > Principles Of Genetics – Quiz 30 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 30 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Which is a true statement about people with the genotype AB for a blood type? A) They have two alleles that are codominant. B) They exhibit a type O phenotype. C) They are homozygous for blood type A. D) They can have only type O children. Show Answer Correct Answer: A) They have two alleles that are codominant. 2. Mitotic cell division results in two cells that have: A) N chromosomes and are genetically identical. B) N chromosomes and are genetically different. C) 2n chromosomes and are genetically identical. D) 2n chromosomes and are genetically different. Show Answer Correct Answer: C) 2n chromosomes and are genetically identical. 3. In Deoxyribonucleic acid, Adenine pairs with the nitrogen base ..... A) Guanine. B) Thymine. C) Cytosine. D) Uracil. Show Answer Correct Answer: B) Thymine. 4. In bunnies, black fur is dominant over white fur. If 50% of one generation of bunnies have white fur, what were the probable genotypes of the parents? A) TT x tt. B) Tt x tt. C) Tt x tt. D) Tt x Tt. Show Answer Correct Answer: B) Tt x tt. 5. An example of polygenic inheritance is ..... A) Skin Color. B) Hitch hikers thumb. C) Blood types. D) None of above. Show Answer Correct Answer: A) Skin Color. 6. T = Tall; t = short and Y = Yellow seeds; y = green seedsWhat is the phenotype for a plant that is Ttyy? A) Tall and green seeds. B) Short and yellow seeds. C) Tall and yellow seeds. D) Short and green seeds. Show Answer Correct Answer: A) Tall and green seeds. 7. Condition that causes colorless hair, skin, and eyes A) Genes. B) Albinism. C) Punnett square. D) Homozygous. Show Answer Correct Answer: B) Albinism. 8. Which of the following BEST describes a genotype with Pp? A) Homozygous recessive. B) Homozygous dominant. C) Heterozygous dominant. D) Heterozygous. Show Answer Correct Answer: D) Heterozygous. 9. Which of these characters is dominant A) Wrinkled shape of seeds. B) Axial position of flowers. C) Green colour of cotyledons. D) Apical position of flowers. Show Answer Correct Answer: B) Axial position of flowers. 10. Who used pea plants to study the inheritance of traits? A) Hippocrates. B) Gregor Mendel. C) Socrates. D) None of the above. Show Answer Correct Answer: B) Gregor Mendel. 11. Phenotype refers to the ..... of an individual A) Genetic makeup. B) Physical appearance. C) Recessive alleles. D) Dominant alleles. Show Answer Correct Answer: B) Physical appearance. 12. A tetrad consists of A) A homologous pair of chromosomes, each made of 2 chromatids. B) The 4 copies of a chromosome that are normally present in cells. C) 2 sister chromatids that have each been replicated during interphase. D) A parental chromosome that was replicated to form a pair, then replicated agai. Show Answer Correct Answer: A) A homologous pair of chromosomes, each made of 2 chromatids. 13. The measure of the likelihood of an event occurring. A) Self-pollinate. B) Probability. C) Pure line. D) F1 generation. Show Answer Correct Answer: B) Probability. 14. In Mendel's pea plants, the homozygous recessive phenotype was white flowers. If Mendel crossed two homozygous recessive pea plants, what color flowers would be seen in the offspring? A) White and purple. B) White. C) Purple. D) Lavendar. Show Answer Correct Answer: B) White. 15. Variation in human skin color is an example of A) Incomplete dominance. B) Codominance. C) Polygenic traits. D) Multiple alleles. Show Answer Correct Answer: C) Polygenic traits. 16. The scientific study of heredity is called ..... A) Meiosis. B) Genetics. C) Mitosis. D) Mendelism. Show Answer Correct Answer: B) Genetics. 17. Normal human eggs have: A) 22 autosomes and an X chromosome. B) 22 autosomes and a Y chromosome. C) 23 autosomes. D) 46 chromosomes. Show Answer Correct Answer: A) 22 autosomes and an X chromosome. 18. Sex cells produced by meiosis have ..... the number of chromosomes as the parent cells. A) Twice. B) Half. C) Thrice. D) 100%. Show Answer Correct Answer: B) Half. 19. During which stage of meiosis does crossing over occur? A) Anaphase I. B) Telophase II. C) Prophase I. D) Metaphase II. Show Answer Correct Answer: C) Prophase I. 20. Specific colors or features (ex:BLUE eyes) A) Charactertistic. B) Trait. C) Genes. D) Alleles. Show Answer Correct Answer: B) Trait. 21. Why did Mendel carry out an experiment following two genes as they passed from one generation to the next? A) He wanted to determine if the segregation of one pair of alleles affects another pair of alleles. B) He wanted to know what determines biological inheritance. C) He wanted to show that some alleles are dominant and some alleles are recessive. D) He wanted to determine if recessive traits would disappear when genes were crossed. Show Answer Correct Answer: A) He wanted to determine if the segregation of one pair of alleles affects another pair of alleles. 22. The trait that covers up or dominates another form of the trait A) Strong. B) Recessive. C) Dominant. D) Weak. Show Answer Correct Answer: C) Dominant. 23. Holly's parents both have brown hair and brown eyes. Her mother has pale skin and always wears her hair in a ponytail, but her father has dark skin and keeps his hair cut very short. Which trait can Holly not inherit from her parents? A) Skin color. B) Eye color. C) Hair color. D) Hairstyle. Show Answer Correct Answer: D) Hairstyle. 24. In this Punnett square, the two parents are heterozygous for green hair (G) What is the percent probability that they will produce offspring who also have green hair? A) 100%. B) 75%. C) 50%. D) 25%. Show Answer Correct Answer: B) 75%. 25. Gregor Mendel's "P" Generation consisted of plants which were ..... with opposite traits. A) Hybrid. B) Heterozygous. C) Incompletely Dominant. D) Purebred. Show Answer Correct Answer: D) Purebred. 26. A recessive trait is observed when an organism has ..... recessive genetic factor(s). A) 1. B) 2. C) 3. D) 0. Show Answer Correct Answer: B) 2. 27. The section of a chromosome (chemical factors) that determine traits are called A) Alleles. B) Traits. C) Genes. D) Characters. Show Answer Correct Answer: C) Genes. 28. Genetic make-up of an organism is known as its A) Dominant. B) Genotype. C) Phenotype. D) Gamete. Show Answer Correct Answer: B) Genotype. 29. Mendel selected which of the following traits for his studies A) Stem length (tall or dwarf), flower position (apical or axial). B) Flower colour (purple or white), seed shape (round or wrinkled). C) Colour of pod (green or yellow), cotyledon colour (yellow or green). D) All of these. Show Answer Correct Answer: D) All of these. 30. What type of gene mutation has occurred here? Normal-AGA-TTC-ATA-GCGMutant-AGA-TTC-AAT-AGC-G A) Substitution. B) Deletion frameshift. C) Insertion frameshift. D) Nonsense. Show Answer Correct Answer: C) Insertion frameshift. ← 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