Thursday 1/19 *Pass back progress reports *Can retake the test during tutorial *SOPA and PIPA! 1.What is one trait that you have from your mother 2.What is one trait that you have from your father 3.What is one trait that neither your father or mother have? Agenda 1.Pass back some stuff 2.Video 3.Genetics Vocab 4.Worksheet

kMuU Discovery channel greatest science discoveries of all time

Whiteboard Questions 1.Why do we study genetics (give at least two reasons) 2.What is the definition of a chromosome? 3.What is the definition of a gene? 4.What is a trait? 5.What is an allele? 6.What is the difference between dominant and recessive? What is an example of each? 7.What are genotype and phenotype? 8.What is the difference between heterozygous and homozygous? 9.How would you complete this Punnett Square?

1)Why do we study genetics? Predict what our children will look like Plan for genetic diseases Make crops that grow more food Produce insulin for diabetes Plants that make their own pesticide Crazy futuristic science like designer genes and growing your own organs

2) Chromosomes –Long pieces of DNA –Many genes are on 1 chromosome 3) Genes –Specific sections of a chromosome –Have a start & stop codon –Code for 1 protein (1 trait)

4) Trait –An observable characteristic –Ex: eye color, blood type, tongue-rolling

5) Allele –Different “versions” of a gene –You inherit one from each parent Ex: eye color alleles = brown, blue, green Shown with letters

6) Dominant –An allele that always “shows” if you have it –Shown with capital letters Recessive –An allele that can be “hidden” by a dominant one –Shown with lower case Ex: –Brown eye allele (B) is dominant over blue eye (b) Someone with Bb has brown eyes

7) Genotype –The genes you have (shown with letters) Phenotype –Your physical traits Ex: If your genotype is bb, your phenotype is blue eyes Is this a genotype or phenotype? Rr tongue rolling ss Brown hair

8) Homozygous –Your 2 alleles are alike (BB or bb) –Homo means Heterozygous –Your 2 alleles are different (Bb) –Hetero means same different

Example Ear Lobes: Attached or Free? Free (dangle) Attached (no dangle) Free Earlobes are dominant (F) Attached Earlobes are recessive (f) Someone with FF = ? Someone with ff = ? Someone with Ff = ?