This quiz works best with JavaScript enabled. Home > Plant > Principles Of Genetics – Quiz 32 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 32 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. In a cross of Bb x Bb, what fraction of the offspring can be expected to express dominant alleles? A) 3/4. B) 1/4. C) 1/2. D) 4/4. Show Answer Correct Answer: A) 3/4. 2. Incomplete dominance is also called A) Blended inheritance. B) Mendelian inheritance. C) None of these. D) All of these. Show Answer Correct Answer: A) Blended inheritance. 3. What did Gregor Mendel use to discover the principles that rule heredity? A) Pea Plant. B) Pigeons. C) Pear trees. D) Photosynthesis. Show Answer Correct Answer: A) Pea Plant. 4. Describes the patterns of inheritance and presentation when a gene mutation is present on a sex chromosome rather than a non-sex chromosome A) Sex-linkage. B) Dominance. C) Segregation. D) Independent assortment. Show Answer Correct Answer: A) Sex-linkage. 5. What does a Punnett square show? A) All the possible outcomes of a genetic cross. B) Only the dominant alleles. C) Only the recessive alleles. D) All of Mendel's 30, 000 crosses. Show Answer Correct Answer: A) All the possible outcomes of a genetic cross. 6. Heterozygous condition wherein the allele that is regarded as dominant completely masks the effect of the allele that is recessive A) Sex-linked. B) Dominance. C) Segregation. D) Independent assortment. Show Answer Correct Answer: B) Dominance. 7. What is the result of meiosis? A) 2 daughter cells that are haploid and genetically different. B) 2 daughter cells that are haploid & identical. C) 4 daughter cells that are diploid & genetically different. D) 4 daughter cells that are haploid & genetically different. Show Answer Correct Answer: D) 4 daughter cells that are haploid & genetically different. 8. What makes a dominant allele different from a recessive allele? A) The dominant allele always mixes with the recessive allele. B) The dominant allele determines the trait. C) The dominant allele determines the trait. D) The recessive allele determines the trait. Show Answer Correct Answer: B) The dominant allele determines the trait. 9. Pink snapdragons are an example of what? A) Multiple alleles. B) Codominance. C) Complete dominance. D) Incomplete dominance. Show Answer Correct Answer: D) Incomplete dominance. 10. A genetic trait that appears in every generation of offspring is called . A) Dominant. B) Recessive. C) Phenotypic. D) Superior. Show Answer Correct Answer: A) Dominant. 11. A mule is the result of a cross between a donkey and a horse. A mule is a A) Hybrid. B) Genotype. C) Tetrad. D) Phenotype. Show Answer Correct Answer: A) Hybrid. 12. On which fruit fly chromosome is the gene for purple eye color located? A) Chromosome 2. B) It can be on a random chromosome. C) The eye chromosome. D) The color chromosome. Show Answer Correct Answer: A) Chromosome 2. 13. Earlobes can be either attached or detached. The allele for attached earlobes is recessive (e), and the allele for detached earlobes is dominant (E). What must be true if a boy is born with attached earlobes? A) He has one of each allele. B) He has a heterozygous genotype. C) He has no recessive alleles. D) He has a homozygous genotype. Show Answer Correct Answer: D) He has a homozygous genotype. 14. Variation in human skin color is a result of A) Incomplete dominance. B) Polygenic traits. C) Codominance. D) Multiple alleles. Show Answer Correct Answer: B) Polygenic traits. 15. Epistasis is the interaction between ..... genes. A) 2. B) 4. C) 8. D) 16. Show Answer Correct Answer: A) 2. 16. Down Syndrome is a disorder in which a person has an extra A) 22nd chromosome. B) 23rd chromosome. C) 21st chromosome. D) 20th chromosome. Show Answer Correct Answer: C) 21st chromosome. 17. T = Tall; t = shortIf you cross a homozygous tall plant with a homozygous short plant, what will the offsprings' phenotype be? A) Tall and short. B) All Tall. C) All Short. D) None of above. Show Answer Correct Answer: B) All Tall. 18. Which one of these did Mendels Hypothesis not mention A) For each inherited trait, an individual has two copies of the gene - one from each parent. B) Organisms donate only one copy of each gene in their gametes. C) There are alternative versions of genes called alleles. D) When two different alleles are present together, one of them might be completely expressed, while the other may have no effect on the physical appearance. Show Answer Correct Answer: B) Organisms donate only one copy of each gene in their gametes. 19. Name the pattern:Two traits produce a blended phenotype A) Incomplete dominance. B) Multiple alleles. C) Polygenic inheritance. D) Codominance. Show Answer Correct Answer: A) Incomplete dominance. 20. Cross in first filial generation produces generation called A) F1 generation. B) P2 generation. C) F2 generation. D) G1 generation. Show Answer Correct Answer: C) F2 generation. ← 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 8Principles Of Genetics Quiz 9Principles Of Genetics Quiz 10 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books