Title: Biology 2/7/07 Objectives: Class Topics 7/2/2019 Title: Biology 2/7/07 Objectives: To assess learning about some of the aberrations to Mendelian genetics and dihybrid crosses and continue to learn about pedigree analysis Class Topics Hand in Probability and dihybrid crosses W.S. before the bell rings please Chapter 8 Quiz 2 Chapter 8 – Beyond Mendel Pedigree analysis Sex-linked inheritance "Go confidently in the direction of your dreams. Live the life you have imagined." Henry David Thoreau Tuesday, July 02, 2019 12:26 PM

Class Assignments Chapter 8 Quiz 2 2/7/07 7/2/2019 Class Assignments What By When Chapter 8 Quiz 2 2/7/07 W.S. Probability and dihybrid crosses 2/7/07 Read 177-182 2/9/07 W.S. Interpreting Information in a Pedigree 2/9/07 Not 3A Due this class period Due next class period Due in the future

7/2/2019 Grade Sheet 2A – p. 157 (5 pts.)

7/2/2019 Postquiz Activities Read 177-182 Correct homework

Pedigree Analysis Seen in every generation Skips generations 7/2/2019 From: http://www.ndsu.nodak.edu/instruct/mcclean/plsc431/mendel/mendel9.htm

7/2/2019 http://faculty.clintoncc.suny.edu/faculty/Michael.Gregory/files/Bio%20101/Bio%20101%20Laboratory/Pedigree%20Analysis/PEDIGREE.HTM

From: http://www.people.virginia.edu/~rjh9u/brachyped.html 7/2/2019 From: http://www.people.virginia.edu/~rjh9u/brachyped.html

Sex-linked inheritance 7/2/2019 Some genes are carried on the X chromosome - Sex-linked genes Fruit flies example White eyed male with red eyed female = all red eyed offspring Crossed two of the F1 offspring and ended up with 3:1 ratio - red to white (all white eyed flies were male!!!) Sex-linked inheritance

Sex-linked inheritance 7/2/2019 Sex-linked inheritance Found mostly in males Males are hemizygous Cannot hide recessive allele Cannot be carriers of trait Females can show trait Must be homozygous recessive Can carry trait (heterozygous) Has nothing to do with hormones Sex-influenced traits