This quiz works best with JavaScript enabled. Home > Plant > Genetics > Principles Of Genetics – Quiz 42 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 42 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. An organism's characteristics are referred to as ..... A) Genes. B) Traits. C) Alleles. D) None of above. Show Answer Correct Answer: B) Traits. 2. How might a geneticist look at the vast numbers of genes in a human? A) By looking at sequences of DNA bases. B) By slicing them with a sharp knife and using a magnifying lens. C) High intensity CAT scans. D) Extensive interviews with tiny aliens they secretly send into their test subjects. Show Answer Correct Answer: A) By looking at sequences of DNA bases. 3. Suppose a white-furred rabbit breeds with a black-furred rabbit and all of their offspring have a phenotype of gray fur. What does the gene for fur color in rabbits appear to be an example of? A) Codominance. B) Incomplete dominance. C) Dominance. D) Mosaicism. Show Answer Correct Answer: B) Incomplete dominance. 4. Genetic information is stored in which part of the cell? A) Nucleus. B) Cytoplasm. C) Cell membrane. D) Mitochondria. Show Answer Correct Answer: A) Nucleus. 5. What is it called when two forms of a trait are both dominant at the same time? A) Incomplete dominance. B) Alleles. C) Codominance. D) Recessive. Show Answer Correct Answer: C) Codominance. 6. When Mendel crossed purebred pea plants having green pods with purebred pea plants having yellow pods, the offspring were ..... A) Pure bread peas with green pods. B) Pure bread peas with yellow pods. C) Hybrid peas with some green and some yellow pods. D) Hybrid peas with all green pods. Show Answer Correct Answer: D) Hybrid peas with all green pods. 7. If all four offspring are heterozygous or hybrid, what are the genotypes of the parents? A) RR, rr. B) Rr, rr. C) Rr, Rr. D) Rr, Rr. Show Answer Correct Answer: A) RR, rr. 8. A cross of a black chicken (BB) with a white chicken (WW) produces all speckled offspring (BBWW). This type of inheritance is known as A) Incomplete dominance. B) Codominance. C) Polygenic inheritance. D) Multiple alleles. Show Answer Correct Answer: B) Codominance. 9. The study of biological inheritance patterns and variation of organisms is called A) Genetics. B) Purebred. C) Traits. D) Cross. Show Answer Correct Answer: A) Genetics. 10. Gregor Mendel studied the inheritance of traits in pea plants. One trait he examined was the height of the plant. Pea plants with the dominant 'T' allele grew tall, and pea plants with the recessive allele 't' were short. According to Mendel's principles of heredity, if a homozygous tall pea plant was crossed with a homozygous short pea plant, approximately how many of their offspring would have the short phenotype? A) 0%. B) 25%. C) 50%. D) 100%. Show Answer Correct Answer: A) 0%. 11. The process of alleles separating during gamete formation is related to what? A) Dominance. B) Survival of the fittest. C) Segregation. D) Probability. Show Answer Correct Answer: C) Segregation. 12. What are gametes? A) Parts of the pea plant that eventually become the stem and leaves. B) They are sex cells such as sperm and eggs. C) A group of monks that studied inheritance. D) A group of kids hanging out at the GameStop. Show Answer Correct Answer: B) They are sex cells such as sperm and eggs. 13. If smooth seeds are dominant to wrinkled, what percentage of the offspring are hybrid when a purebred smooth is crossed with a purebred wrinkled? A) 100%. B) 50%. C) 25%. D) 0%. Show Answer Correct Answer: A) 100%. 14. Hybridization A) Continued breeding of individuals with similar characteristics to maintain the derived characteristics of a kind of organism. B) Breeding technique that involves crossing dissimilar individuals to bring together the best traits of both organism. C) Process of manipulating organisms, cells, or molecules to produce specific products. D) Method of breeding that allows only those organisms with desired characteristics to produce the next generation. Show Answer Correct Answer: B) Breeding technique that involves crossing dissimilar individuals to bring together the best traits of both organism. 15. In pea plants, the purple trait is dominant. If a purebred purple plant crosses with a hybrid purple plant, the offspring will be ..... A) Mostly white. B) 75% purple; 25% white. C) All purple. D) 50% purple; 50% white. Show Answer Correct Answer: C) All purple. 16. Human skin color is an example of what type of inheritance? A) Sex-linked traits. B) Incomplete dominance. C) Multiple alleles. D) Polygenic traits. Show Answer Correct Answer: D) Polygenic traits. 17. The process of transfer of hereditary character from one generation to another is known as .....? A) Genes. B) Mutation. C) Variation. D) Genetics. Show Answer Correct Answer: D) Genetics. 18. Having a pair of identical alleles A) Heterozygous. B) Genotype. C) Phenotype. D) Homozygous. Show Answer Correct Answer: D) Homozygous. 19. Having different alleles for a trait A) Homozygous. B) Heterozygous. C) Homogeneous. D) Purebred. Show Answer Correct Answer: B) Heterozygous. 20. Define Alleles A) Molecule which contains the genetic information for an organism. B) Different versions of the same gene. C) All the chromosomes/DNA that code for an individual's traits. D) Condensed DNA that is visible during cell division. Show Answer Correct Answer: B) Different versions of the same gene. ← 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