2. Karyotyping and Pedigrees Day 1 of Murder Mystery!

3. Karyotypes A display of the 46 chromosomes Tool that geneticists use to study genetic disorders

4. Pedigrees Pedigree is a tool used by geneticists Pedigree: –A family tree that records and traces the occurrence of a trait in a family Men are squares; women are circles Colored shapes represent individuals that show the trait Parents connected by horizontal lines w/children beneath them What’s missing? How do we figure out the genotypes of each individual?

5. Pedigrees: Finding the Genotype First-born daughter in 3rd generation has attached lobes, but both of her parents have free. We know that attached lobe trait must be recessive –If it were dominant, at least one of the parents would have attached lobes Both parents are carriers: Carrier: –Has one copy of allele, but doesn’t express it (phenotype) I’ll draw mine…

6. Pedigrees: Sex-linked Disorders