What are Punnett squares and what are they used for?
Punnett squares are used to predict what traits children will inherit from their parents. Unfortunately, they do not predict the traits for any one specific child, just the percentage chance that a child will get a trait from their parents. The video below explains how to set up and use a Punnett square.
Some traits are on the X or Y chromosome which means that they are passed on differently to boys and girls. Boys are much more likely to be expressed in boys than girls but girls are more likely to be carriers. Watch the video to learn about sex-linked traits and Punnett squares.
Blood types are controlled by genes. Watch the video below to learn about blood types and how to predict blood types using Punnett squares.
Unfortunately, not all genes are simply dominant or recessive. The video below shows you how to do Punnett squares for incomplete dominance, codominance, and polygenic traits.
Click here for more practice.