Reminders Unit 8 Exam- Tuesday, March, 21st Last day to turn in ANY Unit 7 Work- Tuesday, March, 21st Assignments completed for Unit 8: Word Wall Reminders

Unit 8: Mendelian Genetics 8.2 Probability and Punnett Squares

Probability The likelihood a particular event will occur Example: coin flip Probability of flipping a heads: ½ or 50% Probability of flipping 3 heads in a row: ½ x ½ x ½ = 1/8 or 12.5%

Diagrams that predict the outcome of a genetic cross by considering all possible combinations of gametes in the cross. Punnett Square

Steps to making a Punnett Square ** See page 4 of your notes ** Start with the parents Figure out the gametes Line them up on a Punnett square (2x2) Write out the new Genotypes Figure out the results Steps to making a Punnett Square

The mother is homozygous recessive for a straight pinky finger and the father is homozygous dominant for a crooked pinky finger. Draw a Punnett Square to determine the possible: a. genotypes b. phenotypes Monohybrid Example

A heterozygous female mouse for black, short hair is crossed with a homozygous recessive male with white fur and long hair. a. genotypes b. phenotypes Dihybrid Example