Genentics - Boy or Girl - Punnett Squares

Scientists use a gird-like tool call a Punnett square to make predictions about various inheritance problems. The Punnett square shows only the probability of what might occur and not the actual results. probability is the chance of something occuring. if you flip a coin 100 times, since there are 2 sides to the coin, you would expect 50 heads and 50 tails. if you actually flip the coin 100 times, you may actually get 40 head and 60 tails. prediction is one thing, and actually getting the predicted results is another.

The Punnett square only shows the chances of what might occur each time the event is undertaken.