Part II tt You will repeat the procedure for parents that are Tt and 1. make your predictions by setting up a Punnet square for the parents. (This one is not set up for you) How many are predicted to be: Short Toe ______ Long Toe ______ **Replace one of your pennies (chips) with a tt penny Perform the flips with your new set of parents. Record your data in the table below Total Tt tt What percentage of your offspring is Tt? _____ What percentage are short toes _______ What percentage of your offspring is tt? _____ What percentage are long toes _______ Compare the Predicted Ratios of the cross to the Actual Ratios. Actual (from Predicted (from Square) flips) Toe Long Toe Analysis 1. Why are the Predicted Ratios rarely the same as the Actual Ratios? 2. Why are Punnet squares useful for determining the probabilities of phenotypes in the offspring?
Part II You will repeat the procedure for parents that are Tt and tt 1. make your predictions by setting up a Punnet square for the parents. (This one is not set up for you) How many are predicted to be: Short Toe ______ Long Toe ______ **Replace one of your pennies (chips) with a tt penny Perform the flips with your new set of parents. Record your data in the table below Total Tt tt What percentage of your offspring is Tt? _____ What percentage are short toes _______ What percentage of your offspring is tt? _____ What percentage are long toes _______ Compare the Predicted Ratios of the cross to the Actual Ratios. Predicted (from Square) Actual (from flips) Toe Long Toe Analysis 1. Why are the Predicted Ratios rarely the same as the Actual Ratios? 2. Why are Punnet squares useful for determining the probabilities of phenotypes in the offspring?
penny_genetics.docx