Date Feb 19 2015 Page Table of Contents

Date: Feb 19, 2015 Page: Table of Contents p. 25 W. O. D: Last 5 pages Warm-ups: Front Cover W. O. D. : Genetic engineering- is the process of manually adding new DNA to an organism. The goal is to add one or more new traits that are not already found in that organism. Question: What do you think is one benefit of . genetic engineering?

Human Traits • Albinism (recessive) • Cleft chin (dominant) • • Cheek dimples • (dominant) • Free (dominant) or attached (recessive) • earlobes • Wet (dominant) or dry (recessive) earwax Face freckles (dominant) Hitchhiker's thumb (recessive) Widow's peak (dominant)

A pedigree chart is a diagram that shows the phenotypes of a particular gene its ancestors pass from one generation to the next. • Males are represented by squares • Females are represented by circles • Males with the trait as their phenotype are solid squares • Females with the trait as their phenotype are solid circles.

High Cholesteral Pedigree = Male, High Cholesteral = Female, High Cholesteral

1. In 3 generations, how many people have the phenotype for high cholesteral? 2. How many males have high cholesteral? How many females?

3. If a horizontal line means marriage, how many children married in the second generation? 4. Of those who married, how many had children with high cholesteral?

Sex/X-Linked Traits • X-linked inherited diseases occur far more frequently in males because males only have one X chromosome. • 1 in 20 males in a human population are green color blind • 1 in 400 females in the population are expected to blind. be color

Reading: Skim pages 340 -341. Read pages 342 -343 Answer the four steps to ‘Problem Solving’ for Using a Pedigree: 1. Define 2. Organize 3. Create a solution 4. Present

Reflection: Y- linked traits Can hairy ears be a phenotype in women?