This quiz works best with JavaScript enabled. Home > Agriculture > Plant > Genetics > Principles Of Genetics – Quiz 29 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Principles Of Genetics Quiz 29 (30 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. When a capital letter is used, what kind of allele is being represented? A) Recessive Allele. B) Codominance. C) Punnett Squares. D) Dominant Allele. Show Answer Correct Answer: D) Dominant Allele. 2. The allele for cheek dimples (D) is dominant to the allele for no cheek dimples (d). Ben and Melissa both have dimples. Ben's genotype is DD and Melissa's genotype is Dd.What percentage of Ben and Melissa's future children will have dimples? A) 100%. B) 0%. C) 50%. D) 25%. Show Answer Correct Answer: A) 100%. 3. DNA Fingerprinting 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) The technique used by biologists to make many copies of a particular gene. 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: 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. 4. A single gene has 3 or more alleles. These are called A) Multiple genes. B) Multiple alleles. C) Codominance. D) Polygenic traits. Show Answer Correct Answer: B) Multiple alleles. 5. How do geneticists use Punnett Squares? A) To predict outcomes of genetic crosses. B) To predict which traits will be dominant. C) To predict which traits will be recessive. D) To predict if two genes can be crossed. Show Answer Correct Answer: A) To predict outcomes of genetic crosses. 6. Green peas are dominant (G) to yellow peas (g). What is the genotype for a hetereozygous dominant offspring? A) Gg. B) Gg. C) GG. D) None of above. Show Answer Correct Answer: A) Gg. 7. A HETEROZYGOUS individual would have the genotype: A) HH. B) Hh. C) Hi. D) Hh. Show Answer Correct Answer: B) Hh. 8. What does homozygous mean? A) An organism has two identical alleles for a trait. B) An organism has two different alleles for a trait. C) The physical characteristics of a trait. D) The actual genetic makeup of a characteristic. Show Answer Correct Answer: A) An organism has two identical alleles for a trait. 9. One of two chromosomes that determines an individual's sex A) Genome. B) Autosome. C) Sex Chromosome. D) Sex-Linked Gene. Show Answer Correct Answer: C) Sex Chromosome. 10. Which of the following best explains the results of letting the F1 purple hybrids self pollinate? A) 100% White. B) 100% Purple. C) 50% Purple, 50% White. D) 75% Purple, 25% White. Show Answer Correct Answer: D) 75% Purple, 25% White. 11. What is cross pollination? A) When pollen from a flower fertilizes itself or another flower on the same plant. B) When pollen from one flower fertilizes a flower on a different plant. C) A plant whose offspring share the same traits as the parent. D) A plant whose offspring is genetically different from the parent. Show Answer Correct Answer: B) When pollen from one flower fertilizes a flower on a different plant. 12. Incomplete dominance means that the traits are A) Expressed equally. B) Dominant. C) Recessive. D) Blended. Show Answer Correct Answer: D) Blended. 13. How did Gregor Mendel discover the basic principles of genetics? A) Study of corn. B) Study of mice. C) Study of bats. D) Study of pea plants. Show Answer Correct Answer: D) Study of pea plants. 14. Coat color in cats is a sex-linked trait controlled by two genes, black and orange-brown, located on the X chromosome. Heterozygous cats will have a calico color, and homozygous cats will be black if they received the black gene or orange-brown if they received the orange-brown gene. If a black male and an orange-brown female have kittens, what percentage of male kittens would be expected to have the calico color? A) 0%. B) 75%. C) 50%. D) 25%. Show Answer Correct Answer: A) 0%. 15. Hemophilia is a x-linked disorder. A woman is a carrier for the disorder. Which is the correct genotype? A) Hh. B) XHXh. C) Hh. D) XhXh. Show Answer Correct Answer: B) XHXh. 16. Scientific studies show that identical twins who were separated at birth and raised in different homes may vary in height, weight, and intelligence. The most probable explanation for these differences is that ..... A) Original genes of each twin increased in number as they developed. B) One twin received genes only from the mother while the other twin received genes only from the father. C) Environments in which they were raised were different enough to affect the expression of their genes. D) Environments in which they were raised were different enough to change the genetic makeup of both individuals. Show Answer Correct Answer: C) Environments in which they were raised were different enough to affect the expression of their genes. 17. A cross that involves a single inheritable trait is called a ..... cross A) Test. B) Dihybrid. C) Mendelian. D) Monohybrid. Show Answer Correct Answer: D) Monohybrid. 18. The sex of a person depends on A) The genetic makeup of autosomes found in the egg cell. B) The genetic makeup of autosomes found in the sperm cell. C) Whether the unfertilized egg contains an X or Y-chromosome. D) Whether the sperm that fertilizes the egg contains an X or Y-chromosome. Show Answer Correct Answer: D) Whether the sperm that fertilizes the egg contains an X or Y-chromosome. 19. A Punnett Square shows all the following EXCEPT A) All possible results of a genetic cross. B) The genotypes of the offspring. C) The genotypes of each parent. D) The actual results of a genetic cross. Show Answer Correct Answer: D) The actual results of a genetic cross. 20. In fruit flies, the gene for eye color is located on the X chromosomes, and the red eye allele (R) is dominant to the white eye allele (r). A female fly with genotype XRXr is mated with a male fly with genotype XrY. Which of the following statements best describes the expected outcome of the cross? A) The chance that a male offspring will have white eyes is 0%. B) The chance of an offspring having white eyes is 50%. C) The chance that a female offspring will have red eyes is 100%. D) The chance of an offspring having red eyes is 75%. Show Answer Correct Answer: B) The chance of an offspring having white eyes is 50%. 21. A sudden change in the gene which is heritable from one generation to other is known as? A) Mutation. B) Totipotency. C) Cloning. D) Variation. Show Answer Correct Answer: A) Mutation. 22. The phenotype is the ..... A) Physical appearance of an organism. B) Genetic makeup. C) Alleles acquired from a specific parent. D) None of above. Show Answer Correct Answer: A) Physical appearance of an organism. 23. If a trait SKIPS a generation, it is an indication that the trait is ..... A) Dominant. B) Co-dominant. C) Recessive. D) Incompletely dominant. Show Answer Correct Answer: C) Recessive. 24. Principle of Dominance A) Micrograph of the complete diploid set of chromosomes grouped together in pairs, arranged in order of decreasing size. B) The technique used by biologists to make many copies of a particular gene. C) Mendel's second conclusion, which states that some alleles are dominant and others are recessive. D) One of Mendel's principles that states that genes for different traits can segregate independently during the formation of gametes. Show Answer Correct Answer: C) Mendel's second conclusion, which states that some alleles are dominant and others are recessive. 25. Meiosis results in the formation of A) Body cells. B) 2N daughter cells. C) Haploid cells. D) Diploid cells. Show Answer Correct Answer: C) Haploid cells. 26. If a gene is found only on the X chromosome and not the Y chromosome, it is said to be what? A) Polygenic trait. B) Sex-linked trait. C) Codominant trait. D) Incomplete dominance trait. Show Answer Correct Answer: B) Sex-linked trait. 27. Chart that shows the presence or absence of a trait according to the relationships within a family across several generations A) Nondisjunction. B) Genomics. C) Genome. D) Pedigree. Show Answer Correct Answer: D) Pedigree. 28. Cross between individuals for a single contrasting trait A) Monohybrid. B) Hybrid. C) Genohybrid. D) None of above. Show Answer Correct Answer: A) Monohybrid. 29. How many traits did Mendel study in his pea plants? A) 3. B) 5. C) 7. D) 1. Show Answer Correct Answer: C) 7. 30. What is an acquired trait? A) A trait that you get during your lifetime. B) Shopping at Target. C) Going to walmart. D) Something cool. Show Answer Correct Answer: A) A trait that you get during your lifetime. ← 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