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Life Science Week 25

Life Science Week 25. Heredity. Standard S7L3a. Explain the role of genes and chromosomes in the process of inheriting a specific trait. Standard S7L3.c. Recognize that selective breeding can produce plants or animals with desired traits. Monday Warm Up (121).

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Life Science Week 25

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  1. Life Science Week 25 Heredity

  2. Standard S7L3a • Explain the role of genes and chromosomes in the process of inheriting a specific trait.

  3. Standard S7L3.c • Recognize that selective breeding can produce plants or animals with desired traits.

  4. Monday Warm Up (121) • Find one trait (characteristic) that everyone at your table share. • Examples: freckles, cleft chin, dimples, blues eyes, brown eyes, tongue rolling, widow’s peak, etc.

  5. Pre-Test Heredity/Genetics • 1. The uppercase letter W represents the dominant allele for white wool in sheet. The recessive allel for black wool is represented by the lowercase w. All the offspring of two sheep are black. What are the genotypes of the offspring? • A. Ww B. ww C. WW D. black

  6. 2. In anole lizards, the dominant allele L governs the trait for long tails. The recessive allele l governs the trait for short tails. A female lizard with the genotype LL mates with a male lizard with the genotype Ll. What phenotype(s) will their offspring have? • A. long tails • B. short tails • C. medium-length tails • D. either long or short tails

  7. 3. Suppose hair color for cats exhibits incomplete dominance. The male cat has the following alleles for black fur: (BB). The female cat has the following alleles for white fur: (WW). What will be the phenotype of all the offspring from this cross? • A. BW • B. WW • C. black fur • D. gray fur

  8. 4. Which of the following does NOT affect the traits that an organism inherits? • A. DNA • B. Punnett square • C. gene • D. chromosome

  9. 5. Where are genes located? • A. inside the chromosomes in a cell’s nucleus • B. inside the DNA in a cell’s nucleus • C. inside the alleles in a cell’s cytoplasm • D. inside the traits in a cell’s cytoplasm

  10. 6. Which lists the structures in the nucleus of a cell from smallest to largest? • A. DNA, allele, gene, chromosome • B. gene, DNA, allele, chromosome • C. gene, DNA, chromosome • D. DNA, gene, chromosome

  11. 7. A person has attached earlobes, which is a recessive trait. What two alleles make up the gene responsible for this trait. • A. one for attached, one for unattached. • B. two for unattached • C. two for attached • D. one for unattached, two for attached

  12. 8. An animal has 32 pairs of chromosomes in its body cells. How many chromosomes would one of its gametes have? • A. 8 • B. 16 • C. 32 • D. 64

  13. 9. Which is NOT true of selective breeding? • A. It always produces unhealthy offspring. • B. It can be used to weed out weak genes. • C. It can be used to pass on desirable genes. • D. It has been used by humans for thousands of years.

  14. 10. Which is MOST likely the goal of selective breeding on a farm? • A. a cow that produces less milk than other cows • B. a horse that is stronger than other horses • C. corn that is smaller and less flavorful than other corn • D. wheat that is less hearty than other wheat.

  15. Video • Biologically Speaking: Genetics and Heredity

  16. Tuesday Warm Up (121) • How did you end up with the color of eyes that you have?

  17. Trait Analysis

  18. Trait Analysis

  19. Trait Inventory • Create a class chart for trait inventory • Create bar graphs of traits.

  20. Wednesday Warmup (121) • Compare and contrast dominant and recessive traits.

  21. Cornell notes p. 114 – 119Section Review p. 119 • Heredity • Who was Mendel • Self-pollinating • Cross-pollination • Traits • Dominant trait • Recessive trait • Ratio in Mendel’s experiment

  22. Cornell notes p. 114 – 119Section Review p. 119 • Heredity • Who was Mendel • Self-pollinating • Cross-pollination • Traits • Dominant trait • Recessive trait • Ratio in Mendel’s experiment

  23. Cornell notes p. 114 – 119Section Review p. 119 • Heredity • Who was Mendel • Self-pollinating • Cross-pollination • Traits • Dominant trait • Recessive trait • Ratio in Mendel’s experiment

  24. Cornell notes p. 114 – 119Section Review p. 119 • Heredity • Who was Mendel • Self-pollinating • Cross-pollination • Traits • Dominant trait • Recessive trait • Ratio in Mendel’s experiment

  25. Cornell notes p. 114 – 119Section Review p. 119 • Heredity • Who was Mendel • Self-pollinating • Cross-pollination • Traits • Dominant trait • Recessive trait • Ratio in Mendel’s experiment

  26. Cornell notes p. 114 – 119Section Review p. 119 • Heredity • Who was Mendel • Self-pollinating • Cross-pollination • Traits • Dominant trait • Recessive trait • Ratio in Mendel’s experiment

  27. Thursday Warmup (121) • When you compute the average number of times a particular genotype will occur in offspring, how does that compare to the number that will actually occur? • For example, if BB and bb cross, how will the expected genotypes compare to the actual genotypes?

  28. Genes Alleles Phenotype Genotype Punnett square probability Calculating probabilities Incomplete dominance Genes per trait Influence of the environment Cornell notes p. 120 – 125Section Review p. 125

  29. Genes Alleles Phenotype Genotype Punnett square probability Calculating probabilities Incomplete dominance Genes per trait Influence of the environment Cornell notes p. 120 – 125Section Review p. 125

  30. Genes Alleles Phenotype Genotype Punnett square probability Calculating probabilities Incomplete dominance Genes per trait Influence of the environment Cornell notes p. 120 – 125Section Review p. 125

  31. Genes Alleles Phenotype Genotype Punnett square probability Calculating probabilities Incomplete dominance Genes per trait Influence of the environment Cornell notes p. 120 – 125Section Review p. 125

  32. Genes Alleles Phenotype Genotype Punnett square probability Calculating probabilities Incomplete dominance Genes per trait Influence of the environment Cornell notes p. 120 – 125Section Review p. 125

  33. Genes Alleles Phenotype Genotype Punnett square probability Calculating probabilities Incomplete dominance Genes per trait Influence of the environment Cornell notes p. 120 – 125Section Review p. 125

  34. Friday Warmup (121) • Complete this Punnett Square. What percentage show the trait (phenotype) of R.

  35. Cornell Notes p. 126 – 133Section Review p. 133 • Asexual reproduction • Sexual reproduction • Homologous • Chromosomes • Meiosis • Steps of Meiosis (fig 3) • Sex chromosomes • Sex linked disorders • Pedigree • Selective breeding

  36. Cornell Notes p. 126 – 133Section Review p. 133 • Asexual reproduction • Sexual reproduction • Homologous • Chromosomes • Meiosis • Steps of Meiosis (fig 3) • Sex chromosomes • Sex linked disorders • Pedigree • Selective breeding

  37. Cornell Notes p. 126 – 133Section Review p. 133 • Asexual reproduction • Sexual reproduction • Homologous • Chromosomes • Meiosis • Steps of Meiosis (fig 3) • Sex chromosomes • Sex linked disorders • Pedigree • Selective breeding

  38. Cornell Notes p. 126 – 133Section Review p. 133 • Asexual reproduction • Sexual reproduction • Homologous • Chromosomes • Meiosis • Steps of Meiosis (fig 3) • Sex chromosomes • Sex linked disorders • Pedigree • Selective breeding

  39. Cornell Notes p. 126 – 133Section Review p. 133 • Asexual reproduction • Sexual reproduction • Homologous • Chromosomes • Meiosis • Steps of Meiosis (fig 3) • Sex chromosomes • Sex linked disorders • Pedigree • Selective breeding

  40. Cornell Notes p. 126 – 133Section Review p. 133 • Asexual reproduction • Sexual reproduction • Homologous • Chromosomes • Meiosis • Steps of Meiosis (fig 3) • Sex chromosomes • Sex linked disorders • Pedigree • Selective breeding

  41. Friday Closing (133) • How are dominant and recessive genes displayed?

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