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Class Topics

Hand in Gene Spy W.S. before the bell rings please Correct pedigree lab Autosomal Human Genetic Disorders Quiz review “They (fathers) give it (the Y chromosome) to their sons because if they give it to their daughter, they’re not a daughter.” Nathan Steele.

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Class Topics

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  1. Hand in Gene Spy W.S. before the bell rings please Correct pedigree lab Autosomal Human Genetic Disorders Quiz review “They (fathers) give it (the Y chromosome) to their sons because if they give it to their daughter, they’re not a daughter.” Nathan Steele To learning about autosomal human genetic disorders and review for the Chapter 8 Quiz 3. Title: Biology 2/21/07 Class Topics Objectives: Friday, December 20, 201911:43 PM

  2. Class Assignments What By When • W.S. “X marks the spot” 2/21/07 • Chapter 8 Quiz 3 2/23/07 • Due this class period • Due next class period • Due in the future

  3. Grade Sheet 2A – p. 157 (5 pts.)

  4. From: http://campus.queens.edu/faculty/jannr/Genetics/images/height.jpg

  5. Traits influenced by environment • Hydrangea • Color is influenced by the soil pH • Acidic = blue flowers • Neutral, basic – pink/red flowers • Skin color • Tanning • Traits determined by nutrition • Studied by scientists using identical twins

  6. Twins • 2 eggs + 2 sperm - fraternal • siblings - no closer genetically • 1 egg + 1 sperm - identical • same exact genome • used in genetic studies • conjoined or Siamese twins aren’t separated

  7. Calico cat: State cat of Maryland! From: http://www.thecalico.com/pictures/Pumpkin3.jpg http://www.msa.md.gov/msa/mdmanual/01glance/symbols/html/cat.html

  8. Links • Sex-linked Inheritance quiz • Blue People of Kentucky

  9. Autosomal Human Genetic Disorders • Cystic Fibrosis • Recessive • mostly European ancestory • Thick mucus clogs breathing passages • Sickle-Cell Anemia • Recessive • Mostly African or Mediterranean ancestory • Heterozygous immune to malaria • Causes RBC to be sickle shaped

  10. Olney’s albino squirrels Autosomal Human Genetic Disorders • Albinism • Recessive • Can’t produce melanin • autosomal • Tay-Sachs • Recessive • Mostly Eastern European Jews • Nervous system breaks down (death before age 5) • autosomal

  11. Human Genetic Diseases • Phenylketonuria (PKU) • Recessive • Can’t live without special diet • Huntington’s Disease • Dominant • Muscular and nervous systems break down in late 30’s early 40’s (dead in 10-15 years)

  12. Chapter 8 Quiz 3 • Pedigree • Read and draw • Know why they are recessive or dominant and sex-linked or autosomal • X-linked crosses • Just like on board • Inheritance of sex-linked chromosomes • Examples of multiple alleles and polygenic traits • Human genetic diseases (matching)

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