1. Use the following information to answer the question: Parental cross is RrYy x RrYy Seed Shapes are R-round, r-wrinkled Seed colors are Y-yellow, y-green Based on the information given, what is the phenotype ratio of the offspring of this cross? 2. A pea plant heterozygous for height and seed color (TtYy) is crossed with a pea plant heterozygous for height but homozygous recessive for seed color (Ttyy). If 80 offspring are produced, how many are expected to be tall and have yellow seeds? 3. What is the chromosome theory of inheritance? How does this theory explain Mendel's results? 4. A cross between two organisms heterozygous for two different genes (AaBb) results in a 9:3:3:1 phenotype ratio among the offspring. Is the offspring's genotype ratio the same? Explain your answer. 5. How many recessive alleles for a trait must an organism inherit in order to have that trait? 6. Gregor Mendel crossed true-breeding purple-flowered plants with true-breeding white-flowered plants. Explain why all the offspring were purple. 7. Name and explain the categories of gene mutations. 8. What is the role of tRNA in translation? 9. Explain the makeup of the DNA molecule. 10. Define codon. 11. What do the filled-in squares of a Punnett square represent? 12. If a heterozygous dominant tall pea is crossed with a short plant, what is the expected phenotype ratio? 13. Give three examples of phenotypes. 14. Why is skin color classified as polygenic inheritance? 15. If the parental genotype is EeWw, what are the potential allele combinations that could occur at the end of meiosis? 16. During DNA replication, a DNA strand with the bases CTAGGT will produce what complimentary strand of bases? 17. In their experiment, what would Hershey and Chase have concluded if radioactive sulfur was found in the bacteria? 18. If an organism's DNA contains 20% adenine nucleotides, what percentage of its DNA is composed of guanine nucleotides? 19. If an organism's DNA contains 20% adenine nucleotides, what percentage of its DNA is composed of thymine nucleotides? 20. Explain how two gene loci on the same chromosome affect gene linkage. 21. What is inaccurate or misleading about the following statement: individuals adapt to their environment and pass the adaptation to their offspring? 22. Your nerve cells and skin cells contain the same genes. Explain why these cells are different. 23. Explain why sex-linked disorders on the X chromosome are more common in males than females. 24. Name and explain three categories of gene mutations. 25. Albinism is lethal in plants, but many plants produce albino offspring. If albino plants always die before reproducing, how does albinism persist?
1. Use the following information to answer the question: Parental cross is RrYy x RrYy
Seed Shapes are R-round, r-wrinkled
Seed colors are Y-yellow, y-green
Based on the information given, what is the phenotype ratio of the offspring of this cross?
2. A pea plant heterozygous for height and seed color (TtYy) is crossed with a pea plant heterozygous for height but homozygous recessive for seed color (Ttyy). If 80 offspring are produced, how many are expected to be tall and have yellow seeds?
3. What is the chromosome theory of inheritance? How does this theory explain Mendel's results?
4. A cross between two organisms heterozygous for two different genes (AaBb) results in a 9:3:3:1 phenotype ratio among the offspring. Is the offspring's genotype ratio the same? Explain your answer.
5. How many recessive alleles for a trait must an organism inherit in order to have that trait?
6. Gregor Mendel crossed true-breeding purple-flowered plants with true-breeding white-flowered plants. Explain why all the offspring were purple.
7. Name and explain the categories of gene mutations.
8. What is the role of tRNA in translation?
9. Explain the makeup of the DNA molecule.
10. Define codon.
11. What do the filled-in squares of a Punnett square represent?
12. If a heterozygous dominant tall pea is crossed with a short plant, what is the expected phenotype ratio?
13. Give three examples of
14. Why is skin color classified as polygenic inheritance?
15. If the parental genotype is EeWw, what are the potential allele combinations that could occur at the end of meiosis?
16. During
17. In their experiment, what would Hershey and Chase have concluded if radioactive sulfur was found in the bacteria?
18. If an organism's DNA contains 20% adenine
19. If an organism's DNA contains 20% adenine nucleotides, what percentage of its DNA is composed of thymine nucleotides?
20. Explain how two gene loci on the same chromosome affect gene linkage.
21. What is inaccurate or misleading about the following statement: individuals adapt to their environment and pass the adaptation to their offspring?
22. Your nerve cells and skin cells contain the same genes. Explain why these cells are different.
23. Explain why sex-linked disorders on the X chromosome are more common in males than females.
24. Name and explain three categories of gene mutations.
25. Albinism is lethal in plants, but many plants produce albino offspring. If albino plants always die before reproducing, how does albinism persist?
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