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Name: ___________________ Block: ___________ Vocabulary Quiz 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. 11. ________ Allele ________ Principle of Dominance ________ Principle of Segregation ________ Homozygous ________ Heterozygous ________ Phenotype ________ Genotype ________ Punnett Square ________ Co-dominance ________ Incomplete Dominance ________ Locus A. Some alleles are dominant and others are recessive B. One allele is not completely dominant over another that results in a phenotype between the two homozygous phenotypes C. Same alleles D. The phenotype of both alleles are clearly expressed E. Alleles separate from each other during the formation of sex cells F. The physical traits G. A tool used to predict the outcome of a genetic cross H. Different alleles I. The specific location of a gene J. The different forms of a gene. K. The genetic make up Name: ___________________ Block: ___________ Chapter 11 Quiz 1. Red flower color is dominant to white flower color in rose plants. What is the expected phenotypic percentage result of a cross between two heterozygous rose plants? a. 100% white b. 50% red, 50% white c. 25% red, 75% white d. 75% red, 25% white 2. What is the study of heredity? a. Cell and Molecular Science b. Genetics c. DNA Replication d. Mitosis 3. What is the genetic make-up called? a. Genotype b. Co-Dominance c. Phenotype d. Genetics 4. A cross between a dominant homozygous and a recessive homozygous creates a ___________. a. Purebred b. Homozygous offspring c. Parent Generation d. Hybrid 5. A red carnation and a white carnation, both homozygous, combine and make pink carnation offspring. What is the genotypic ratio for the Punnett Square Cross? a. Ratio: Name: ___________________ Block: ___________ b. What kind of dominance is being expressed? a. Codominance b. Incomplete dominance c. Complete Dominance 6. Each gamete has how many alleles in a Punnett Square? a. 1 b. 2 c. 3 d. 4 7. Different forms of a gene are called? a. Traits b. Gametes c. Hybrids d. Alleles 8. Organisms that have two identical alleles for a particular traits are said to be a. Hybrid b. Heterozygous c. Homozygous d. Dominant 9. Human females produce egg cells that have a. One X chromosome b. Two X chromosomes c. One X or one Y Chromosome d. One X and one Y Chromosome 10. What does probability have to do with genetics? Name: ___________________ Block: ___________ 11. A black lab (B1,B1) and a yellow lab (B2,B2) cross and have puppies. All of the puppies are chocolate labs. a. Create the Punnett square for the F1 Generation. b. What kind of dominance is being expressed? 12. A breeder decides to cross two of the chocolate lab dogs. a. Create the Punnett Square for the Cross b. What is the genotypic ratio? Name: ___________________ Block: ___________ Unit Test Multiple Choice 1. The different forms of a gene are called_________. a. Traits b. Alleles c. Hybrids d. Homozygous 2. Who is the father of genetics? a. Einstein b. Darwin c. Watson d. Mendel 3. If a pea plant’s alleles for height are tt, what is true of its parents? a. Both parents contributed a dominant allele b. Both parents contributed a recessive allele c. Both parents were tall d. Both parents were short 4. A homozygous tall plant (TT) is crossed with a homozygous short plant (tt). If the tall F1 pea plants are allowed to self-pollinate, what would be the phenotypic ratio? a. 4:0 b. 4:1 c. 3:1 d. 2:2 5. An organism with two different alleles for a particular trait is said to be ________ a. Hybrid b. Homozygous c. Purebred d. Dominant 6. Each gamete contains how many alleles for a particular trait? a. 1 b. 2 c. 3 d. 4 7. Gregor Mendel’s principles of genetics apply to a. Only Plants b. Only Animals c. Only Pea Plants d. All living things 8. Roan cattle show codominance for the color of their hair. There are alleles for red hair and white hair. What would the expected phenotype look like if the trait showed incomplete dominance instead? a. Red b. White c. Spotted d. Pink Name: ___________________ Block: ___________ 10. The arctic hare turns brown in the summer and white in the winter. What most likely influences this change? a. Gene and the environment b. The environment alone c. Dominant alleles d. Codominant alleles 11. If an organism’s diploid number is 24, the haploid number is _______ a. 14 b. 12 c. 6 d. 48 12. Gametes are produced by the process of mitosis. a. True b. False Name: ___________________ Block: ___________ 13. Human females produce egg cells that have a. One X chromosome b. Two X chromosomes c. One X and One Y chromosome d. One Y chromosome 14. What is the approximate probability that a human offspring will be male? a. 25% b. 50% c. 75% d. 100% 15. How many chromosomes are shown in a normal human karyotype? a. 2 b. 23 c. 26 d. 46 16. Human males have _______ a. One X chromosome only b. Two X chromosomes c. One X and one Y chromosome d. Two Y chromosomes 17. If a woman with blood type A and a man with blood type B produce an offspring, what might be the offspring’s blood type? a. AB or O b. A, B, or O c. A, B, AB, or O d. AB only 18. People who are heterozygous for sickle cell anemia are generally healthy because they a. Are resistant to many different diseases b. Have some normal hemoglobin in their red blood cells c. Are not affected by the gene until they are elderly d. Produce more hemoglobin than necessary 19. Which of the following produces an offspring with Down Syndrom? a. XO in the 23 chromosome pair b. XXY in the 23 chromosome pair c. Trisomy in the 21 chromosome pair d. Trisomy in the 18 chromosome pair 20. In a tobacco plant, the diploid number of chromosomes is 48. How many chromosomes will be found in the pollen grain? a. 96 b. 48 c. 24 d. 12 21. The four cells produced in meiosis will have a: a. N number of chromosomes and will be genetically identical to each other Name: ___________________ Block: ___________ 22. 23. 24. 25. b. N number of chromosomes and will differ genetically from each other c. 2n number of chromosomes and will be genetically identical to each other d. 2n number of chromosomes and will differ genetically from each other. The step in meiosis in which chromosomes line up in a single file line along the equatorial plane of the cell is called: a. Prophase I b. Prophase II c. Metaphase I d. Metaphase II An example of a genotype is: a. Blonde Hair b. R and r c. TtHH d. Hemophiliac Which of the following would not be possible for children of a type AB mother and type A father? a. O b. A c. B d. AB Which of the following factors could lead to variations in offspring? a. Fertilization b. Crossing over c. Independent assortment d. Pure breeding Name: ___________________ Block: ___________ Unit Test Free Response 1. Two heterozygous tall plants cross-fertilized. Create a Punnett Square. (Use the letter “t” in your Punnett square.) a. What is the genotypic ratio? b. What is the phenotypic ratio? c. What is the phenotypic percentage for tall plants? For short plants? 2. When does crossing over occur in meiosis? (What phase?) a. In your own words, describe how crossing over works? b. What is the significant outcome of crossing over? Name: ___________________ Block: ___________ 3. What is non-disjunction? a. What is an example of non-disjunction in humans? 4. Curly haired Carl (𝐶1 𝐶1 ) and pin straight Peggy (𝐶2 𝐶2 ) get married and have a baby girl, Wanda. Unfortunately, the baby was born with very little hair on her head. As the doctor, provide the Punnett square to help predict Wanda’s hair type. a. What hair type does she have? b. What dominance does Wanda’s hair exemplify? 5. Mendel crossed a two purebred pea plants and created an F1 generation of pea plants. The F1 generation are heterozygous purple and tall (PpTt) and cross-pollinate. a. Create a dihybrid cross for PpTt X PpTt Name: ___________________ Block: ___________ b. How many plants will be purple and tall? c. How many plants will be purple and short? d. How many plants will be white and tall? e. How many plants will be white and short? f. What is the phenotypic ratio?