This quiz works best with JavaScript enabled. Home > Plant > Principles Of Genetics – Quiz 12 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 12 (20 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Purebred is the same meaning as ..... A) Heterozygous. B) Homozygous. C) Hybrid. D) None of above. Show Answer Correct Answer: B) Homozygous. 2. How do recessive alleles work? A) The trait only shows up when there is two of them. B) They always show up. C) They don't. D) None of above. Show Answer Correct Answer: A) The trait only shows up when there is two of them. 3. Haploid A) Term used to refer to a cell that contains only a single set of genes. B) Term used to refer to chromosomes in which one set comes from the male parent and one set comes from the female parent. C) Term used to refer to a cell that contains two sets of homologous chromosomes. D) None of above. Show Answer Correct Answer: A) Term used to refer to a cell that contains only a single set of genes. 4. Whats homozygous? A) The case in which the the heterozygote has a phenotype intermediate between those of the two homozygotes. B) Describes the genotype of a trait for which the two alleles an individual carries are the same. C) In genetics a type of family tree that maps the occurrence of a trait in a family. D) None of above. Show Answer Correct Answer: B) Describes the genotype of a trait for which the two alleles an individual carries are the same. 5. Gregor Mendel's "P" generation consisted of purple flower plants crossed with white flower plants. What were the results of this cross? A) All purple flower offspring. B) All white flower offspring. C) Some purple flowers and some white flowers. D) None of above. Show Answer Correct Answer: A) All purple flower offspring. 6. Gregor Mendel developed all of the following principles (laws) of genetics except A) Principle of Dominance and Recessiveness. B) Principle of Mutation. C) Principle of Independent Assortment. D) Principle of Segregation. Show Answer Correct Answer: B) Principle of Mutation. 7. In both parents contribute i alleles, their child will have which blood type? A) A. B) B. C) AB. D) O. Show Answer Correct Answer: D) O. 8. Nondisjunction A) Process in which epigenetic chemical marks can be passed from one generation to the next in a sex-specific way. B) Enzyme that cuts DNA at a sequence of nucleotides. C) Error in meiosis in which the homologous chromosomes fail to separate properly. D) None of above. Show Answer Correct Answer: C) Error in meiosis in which the homologous chromosomes fail to separate properly. 9. A woman with type A blood, marries a man with type A blood(his mother had type O blood). Under normal circumstances which genotype could not occur in their children? A) AA. B) OO. C) AO. D) AB. Show Answer Correct Answer: D) AB. 10. Pedigree A) Entire set of genetic information that an organism carries in its DNA. B) Chart that shows the presence or absence of a trait according to the relationships within a family across several generations. C) Error in meiosis in which the homologous chromosomes fail to separate properly. D) None of above. Show Answer Correct Answer: B) Chart that shows the presence or absence of a trait according to the relationships within a family across several generations. 11. Why was Gregor Mendel important for modern genetics A) He was the first man to understand certain patterns of inheritance. B) He was the first person to find out about Karyotypes. C) He was the first man to understand the amino acid chain. D) None of above. Show Answer Correct Answer: A) He was the first man to understand certain patterns of inheritance. 12. DNA Microarray A) Tool used by biologists that analyzes an individual's unique collection of DNA restriction fragment; used to determine whether two samples of genetic material are from the same person. B) Chart that shows the presence or absence of a trait according to the relationships within a family across several generations. C) Glass slide or silicon cup that carries thousands of different kinds of single- stranded DNA fragments arranged in a grid. A DNA microarray is used to detect and measure the expression of thousands of genes at one time. D) None of above. Show Answer Correct Answer: C) Glass slide or silicon cup that carries thousands of different kinds of single- stranded DNA fragments arranged in a grid. A DNA microarray is used to detect and measure the expression of thousands of genes at one time. 13. Why is crossing over during Prophase I important? A) It purifies the dna to decrease the likelihood of genetic diseases being transferred to offspring. B) It insures the offspring are exactly like the parents creating organisms that are virtually identical to one another in a population. C) The process creates additional chromosomes so the offspring have more chromosomes than the parents and are therefore more likely to survive. D) New combinations of alleles are produced leading to genetic variation in offspring which in essence adds to variation in the population of that species. Show Answer Correct Answer: D) New combinations of alleles are produced leading to genetic variation in offspring which in essence adds to variation in the population of that species. 14. Cystic fibrosis is a recessive genetic disorder that results from a defective gene on chromosome 7. For an individual to have symptoms of this disease, which of the following must be true? (3B2) A) He or she must get a defective gene from either the mother or the father but not from both. B) He or she must get a defective gene from both the mother and the father. C) He or she must get a normal gene from the mother and a defective gene from the father. D) He or she must get a defective gene from the mother and a normal gene from the father. Show Answer Correct Answer: B) He or she must get a defective gene from both the mother and the father. 15. Eggs and sperm are called a zygote when they combine during fertilization. If human sex cells each have 23 chromosomes, how many are there when they form a zygote? A) 11.5. B) 23. C) 46. D) 92. Show Answer Correct Answer: C) 46. 16. A set of genes for one trait ..... One comes from mom and one comes from dad. Always exist as "pairs" ..... A) Genotype. B) Phenotype. C) Gene. D) Alles. Show Answer Correct Answer: D) Alles. 17. Characteristic that is inherited; can be either dominant or recessive A) Genes. B) Allele. C) Chromosome. D) Trait. Show Answer Correct Answer: D) Trait. 18. Which phrase best describes the ending outcome of crossing over? A) Crossing over results in 2 identical cells, resulting in diversity in living things. B) Crossing over results in 2 different cells, resulting in diversity in living things. C) Crossing over results in 4 different gametes, resulting in diversity in living things. D) Crossing over results in 4 identical cells, resulting in diversity in living things. Show Answer Correct Answer: C) Crossing over results in 4 different gametes, resulting in diversity in living things. 19. Which of the following is an example of a heterozygous genotype? A) RR. B) Rr. C) Rr. D) None of above. Show Answer Correct Answer: B) Rr. 20. Gregor Mendel was: A) An English scientist who carried out research with Charles Darwin. B) A little known Central European monk. C) An early 20th century Dutch biologist who carried out genetics research. D) None of above. Show Answer Correct Answer: B) A little known Central European monk. ← 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