This quiz works best with JavaScript enabled. Home > Agriculture > Plant > Genetics > Principles Of Genetics – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 1 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Bacteria are organisms that reproduce asexually. How is this better for them than reproducing sexually? A) They produce more tetrads for reproduction. B) They can grow to larger populations more quickly. C) They use more cellular energy to reproduce. D) They have more genetic variation within their population. Show Answer Correct Answer: B) They can grow to larger populations more quickly. 2. The trait that is covered over by another form of the trait; it seems to disappear A) Strong. B) Dominant. C) Weak. D) Recessive. Show Answer Correct Answer: D) Recessive. 3. A version or variation of a gene A) Trait. B) Gene. C) Allele. D) DNA. Show Answer Correct Answer: C) Allele. 4. An organism that has two identical genes for a trait is said to be ..... A) Heterozygous for the trait. B) Homozygous for the trait. C) Incompletely dominant for the trait. D) Hybrid for the trait. Show Answer Correct Answer: B) Homozygous for the trait. 5. Each pea-plant gamete has how many alleles for the height gene? A) 1. B) 3. C) 4. D) 2. Show Answer Correct Answer: A) 1. 6. If two parents have type AB blood, what is the probability that their child will have type O blood? A) 25%. B) 0%. C) 100%. D) 50%. Show Answer Correct Answer: B) 0%. 7. Which of the following correctly identifies the allele combination of tt? A) Heterozygous. B) Homozygous dominant. C) Homozygous recessive. D) None of above. Show Answer Correct Answer: C) Homozygous recessive. 8. Function of recessive gene A) Produuce functional protein. B) Produce no protein. C) Produce less functional protein. D) B and c. Show Answer Correct Answer: D) B and c. 9. Which of the following is an example of a GENOTYPE? A) 1:2:1. B) Blue. C) 25%. D) Bb. Show Answer Correct Answer: D) Bb. 10. Which of these substances stores and transmits the information that specifies the traits of an organism? A) DNA. B) Carbohydrates. C) Enzymes. D) RNA. Show Answer Correct Answer: A) DNA. 11. Yellow seed color is dominant over green seed color in pea plants. Two plants that are heterozygous for the yellow seed trait are crossed and 200 seeds are produced. How many of the seeds would you expect to be green? A) 50. B) 125. C) 200. D) 100. Show Answer Correct Answer: A) 50. 12. When you flip a coin, what is the probability that it will come up tails? A) 0.125. B) 0.5. C) 0.25. D) 1. Show Answer Correct Answer: B) 0.5. 13. Human skin color occurs in a continuous range because it is affected by the dinteraction of several genes, making it A) Codominant trait. B) Autosomal trait. C) Polygenic trait. D) Sex-linked trait. Show Answer Correct Answer: C) Polygenic trait. 14. When not one trait is dominant over the other ..... you see both traits A) Blending inheritance. B) Polygenic inheritance. C) Incomplete dominance. D) Co-dominance. Show Answer Correct Answer: D) Co-dominance. 15. What is formed at the end of meiosis A) Two genetically identical cells. B) Four genetically different cells. C) Four genetically identical cells. D) Two genetically different cells. Show Answer Correct Answer: B) Four genetically different cells. 16. The trait that appears in hybrid offspring A) Recessive. B) Polygenic. C) Codominance. D) Dominant. Show Answer Correct Answer: D) Dominant. 17. Eye color in fruit flies is sex-linked. The color Red is dominant to the color white. If a female fruit fly that is heterozygous for eye color is crossed with a male fruit fly expressing the dominant trait, the offspring will have what color eyes? A) White. B) Red. C) Pink. D) Red and white. Show Answer Correct Answer: B) Red. 18. How is it possible that two different genotypes can make one phenotype? A) Heterozygous dominant and homozygous dominant. B) Homozygous recessive and homozygous dominant. C) Homozygous recessive and heterozygous recessive. D) Its not. Show Answer Correct Answer: A) Heterozygous dominant and homozygous dominant. 19. Homozygous phenotypes are Black and WhiteA heterozygous organism will have ..... flowers if the trait is incompletely dominant. A) Only Black. B) Gray. C) Only White. D) Both Black and White. Show Answer Correct Answer: B) Gray. 20. Gametes are eggs and sperm (sex cells). Human have 46 chromosomes, but how many are found in their liver cells? A) 46. B) 11.5. C) 92. D) 23. Show Answer Correct Answer: A) 46. 21. The physical characteristic that shows up in an organism (what you see) A) Phenotype. B) Homozygous. C) Genes. D) Genotype. Show Answer Correct Answer: A) Phenotype. 22. A heterozygous tall pea plant is crossed with a short plant. The probability that the F1 plant will be short. (F1 generation are the offspring) A) 25%. B) 50%. C) 100%. D) 75%. Show Answer Correct Answer: B) 50%. 23. Which of the following is NOT true of the Principle of Dominance? A) Some alleles are dominant and some are recessive. B) Dominant alleles will always be shown if present. C) Recessive alleles will only be seen when here are no dominant alleles. D) Recessive alleles are never inherited. Show Answer Correct Answer: D) Recessive alleles are never inherited. 24. Gregor Mendel studied inheritance of traits in which organism? A) Honey bees. B) Fruit flies. C) Caper tigers. D) Pea plants. Show Answer Correct Answer: D) Pea plants. 25. Chromosome that is not a sex chromosome. Also called autosomal chromosome A) Genomics. B) Genome. C) Autosome. D) Karyotype. Show Answer Correct Answer: C) Autosome. 26. Which is a difference between mitosis and meiosis? A) Mitosis is sexual, meiosis is asexual. B) Mitosis has two divisions, meiosis has one division. C) Mitosis produces genetically diverse cells, meiosis produces identical cells. D) Mitosis produces diploid cells, meiosis produces haploid cells. Show Answer Correct Answer: D) Mitosis produces diploid cells, meiosis produces haploid cells. 27. An individual that has two different alleles for a trait ..... A) Homologous. B) Heterozygous. C) Heredity. D) Homozygous. Show Answer Correct Answer: B) Heterozygous. 28. How are Alleles represented in your Genotype? A) They are ordered from most common to least common. B) They are ordered by which trait you inherited from your mother followed by the trait you inherited from your father. C) They are represented by a number to signify which chromosome they come from. D) They are a form of a trait that is represented by an uppercase or lowercase letter to show if they are dominant traits or recessive traits. Show Answer Correct Answer: D) They are a form of a trait that is represented by an uppercase or lowercase letter to show if they are dominant traits or recessive traits. 29. What is a gene map? A) DNA coding that dictates where chromosomes are arranged within the nucleus. B) It was a layout designed by Gregor Mendel that shows where pea plants grew in his garden. C) An organized layout of the relative locations of each gene on a chromosome. D) A set of directions folded in multiple ways that chromosomes use to navigate through a cell rather than stopping and asking for directions. Show Answer Correct Answer: C) An organized layout of the relative locations of each gene on a chromosome. 30. Which represents the genotype of a homozygous condition? A) Bb. B) Bc. C) BC. D) Bb. Show Answer Correct Answer: A) Bb. 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