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As journal – answer questions In the packet: 12. (“Fur color….”), 13. (“A genetic disorder…”) Directions : Summarize the questions (or copy only the necessary parts) Write the correct answer. Explain your answer. Trait black fur white fur short-haired fur long-haired fur. Gene B
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As journal – answer questions • In the packet: • 12. (“Fur color….”), • 13. (“A genetic disorder…”) • Directions: • Summarize the questions (or copy only the necessary parts) • Write the correct answer. • Explain your answer.
Trait black fur white fur short-haired fur long-haired fur Gene B b S s BbSs (male) bbss (female) • All offspring will have black hair • All offspring will have white hair • All offspring will have long-haired fur • All offspring will have short-haired fur
A genetic disorder due to a recessive allele is lethal….. Which of the following is likely to result?
A.The disorder will quickly be eliminated since no recessive homozygotes will survive to reproduce. B. The disorder will be maintained in the population through the reproduction of heterozygotes. C.Only homozygous dominant (AA) individuals will survive. D. The prevalence of the disorder will increase over time.
1. A. B. 2. 3. C. 4. D. 5. 18. Which cells (write numbers) are diploid?
In Review: Meiosis, Genetics, Genetic Variation In pairs: respond shortly to the following slides. If no directions are given, give an example. When your answer is incorrect look at the others’ responses, and correct yourself.
Use the trait of tongue rolling: R = can roll r = cannot 1. Homozygote Genotype 2. Recessive allele 3. Heterozygote Genotype 4. Phenotype of heterozygote:
1. A. B. 2. 3. C. 4. D. 5. 6. 22. What kind of cells are cells 1 and 6?
6. All possible genotypes 7. Phenotype (any example) 8. Genotype of a person that cannot roll tongue. 9. Two tongue-rolling parents have a daughter than cannot roll tongue. Parents’ genotypes must be:
10. Children of two heterozygote parents: Chances for them to roll tongue. 11. Possible gametes of a heterozygous parent.
? ? ? ? Ff I f ? F ? II f 12. What are the red arrows pointing out?
? ? ? ? Ff I f ? F ? II f 13. What are the red arrows pointing out?
14. Number of chromosomes in a human skin cell. 15. Number of chromosomes in a human sperm cell. 16. Name a cell in a plant that is haploid. 17. Name a cell in a plant that is diploid.
15. Sex Chromosomes of a human female: 16. Give an example of an autosomal chromosome: 17. Chances that a color-blind (X-linked) father will pass on colorblindness to his son:
1. A. B. 2. 3. C. 4. D. 5. 21. What is happening in processes A and B?
23. Write all possible gametes of a parent with GgRR. 24. Draw crossing over between homologous chromosomes.
1. A. B. 2. 3. C. 4. D. 5. 19. Which cells (write numbers) are haploid?
1. A. B. 2. 3. C. 4. D. 5. 20. Which process (write letter) is fertilization?
Practice Questions: >15 min< • Answer: • Handout of questions: • 1-11, 14-19, 37-40 • Group: 1, 4, 15, 16, 18
Tt x Tt Phenotypic ratio: Tall plant = T Short plant = t
Tt x Tt Genotypic ratio: Tall plant = T Short plant = t
Tt x tt Phenotypic ratio: Tall plant = T Short plant = t
Tt x tt Genotypic ratio: Tall plant = T Short plant = t
Diploid/haploid Draw a haploid cell
