Lab-Using Punnett Squares to Predict Actual Ratios The Penny Flipping Lab

Introduction & Objectives You will simulate Meiosis, the Law of Segregation and fertilization using pennies. You will make a prediction using Punnett Squares and then determine if the Actual Ratios, flipping the pennies, are the same as your Predicted Ratios, Punnett squares.

Getting Started You will need the packet and 2 pennies.

Getting Started Read the directions and answer the questions.

Start Flipping Begin by flipping both pennies. Record the gene combination as a tally mark in the appropriate genotype row in the table.

Continue Flipping Repeat this process again. Record each result in the appropriate space.

100 times Continue flipping both coins a total of 100 times This make the math easier later

Doing Math Total your tally marks for each genotype and record. Do the same for the phenotypes.

Transferring Information Now transfer your predicted results from the page 1 Punnett Square Express your results as a percent Then transfer your data results from page 2 Now you know why you flipped 100 times!

Repeat the Process Repeat for parents that are Tt & tt. You will only need to flip one coin as it is understood that the second coin will ALWAYS be a little “t”.

Finishing Up Finish flipping the coin 100 times and complete the tables as before Answer the Analysis questions and turn it in. Read the board for further instructions.