What are the chances that you were born a boy or a girl? Would you say a 100% chance? 50/50? What does that really mean? Let's use a penny as a model for gender selection. Think of heads as a girl and tails as a boy.
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When you flip a normal coin, y
The video below demonstrates how to determine probability of gender inheritance using a Punnett square instead of a penny.
Occasionally, there are additional issues of inheritance based on gender. For example, more males than females are color blind. The trait for color blindness is determined by a gene on the X chromosome. Females are often carriers of the trait but aren't colorblind. Males who carry the trait are color blind. Click sex-linked traits to investigate the probability of inherited disorders linked to the X chromosome. The link opens in a new window. When you're finished exploring, close the window to return to the resource.