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A dragon fly had 8528 eggs. Mr. Horton painstakingly collected the following data

Monday 2/6 *Quiz Friday (2-3) or Thursday (5,6,7) *Turn in Karyotype Activity if you didn’t already (will be counted late). Agenda Talk about Science courses for next year Go over karyotype worksheet Genetic Disorder Videos Finish Sex-Linked Disorder Notes.

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A dragon fly had 8528 eggs. Mr. Horton painstakingly collected the following data

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  1. Monday 2/6*Quiz Friday (2-3) or Thursday (5,6,7)*Turn in Karyotype Activity if you didn’t already (will be counted late) • Agenda • Talk about Science courses for next year • Go over karyotype worksheet • Genetic Disorder Videos • Finish Sex-Linked Disorder Notes A dragon fly had 8528 eggs. Mr. Horton painstakingly collected the following data 1. What percentage of the babies had each trait? 2. Which allele is dominant, red or blue eyes? 3. What are the genotypes of the parents? (Hint: BB, Bb, bb)

  2. Objectives State Standard: S4C2PO3) Explain how genotypic variation occurs and results in phenotypic diversity Application to real life: • Predicting whether children will have genetic diseases • Explain why males are more likely to have certain genetic diseases

  3. Science courses for next year • Need 3 credits of science • 4 is good, especially if you think you want to study science in college • Two main options, Earth & Space or Physics • Physics/ Engineering Physics • must take geometry either before or same year • Mr. Horton encourages you to take it • Chemistry • usually taken as a junior • Earth and Space • Harder than bio • Can take physics junior year Anatomy and Physiology Biotechnology Environmental Science Forensics Engineering

  4. Sex-Linked Traits • Some genes are on X chromosome • But have no matching gene on Y

  5. Recessive form of trait • MUCH more common in males • Males have only 1 X • So if they have a recessive, it “shows”

  6. Ex: Colorblindness • Gene for color vision is on X • C is normal, c is colorblind • XCXC OR XCXC • Females with normal color vision • XCY • Male with normal color vision • XCXCOR XCY • Female or male with colorblindness Males have no “back up” What is on their X “shows”

  7. Ex: Hemophilia • Gene for blood clotting is on X • Normal clotting is dominant • Hemophilia is recessive • People with only recessive have Hemophilia

  8. Achondroplasia http://www.youtube.com/watch?v=Bn7eGRsYYGI

  9. Albinismhttp://www.youtube.com/watch?v=OrX5HflxQQs

  10. Huntinton’shttp://www.youtube.com/watch?v=uVkzi-kdOrc

  11. Cystic Fibrosis http://www.youtube.com/watch?v=Dn0grhu9h4g

  12. Hemophiliahttp://www.youtube.com/watch?v=FS64UXi74lY

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