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)

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)

Agenda1. Talk about Science courses for

next year2. Go over karyotype worksheet3. Genetic Disorder Videos4. Finish Sex-Linked Disorder

Notesblue eyes 6309

red eyes 2219

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

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

Earth and Space

• Harder than bio

• Can take physics junior year

Physics/ Engineering Physics

• must take geometry either before or same year

• Mr. Horton encourages you to take it

Chemistry

• usually taken as a junior

Anatomy and Physiology

Biotechnology

Environmental Science

Forensics

Engineering

Sex-Linked Traits

• Some genes are on X chromosome– But have no matching gene on Y

• Recessive form of trait– MUCH more common in males

• Males have only 1 X– So if they have a recessive, it “shows”

• 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

• XCXC OR XCY– Female or male with colorblindness

Males have no “back up”What is on their X “shows”

• Ex: Hemophilia

• Gene for blood clotting is on X– Normal clotting is dominant– Hemophilia is recessive– People with only recessive have Hemophilia

Achondroplasiahttp://www.youtube.com/watch?v=Bn7eGRsYYGI

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

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

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

=Dn0grhu9h4g

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