X-linked dominant inheritance

Hey kiddo, do you know about genetic traits? They're things that you inherit from your parents that make you who you are! Some traits come from something called chromosomes, which are like tiny little instruction manuals that tell your body what to do.
Now, let's talk about X-linked dominant inheritance. You know how boys have one X chromosome and one Y chromosome, and girls have two X chromosomes? X-linked genetic traits are carried on the X chromosome, which means that girls have twice as many chances to inherit them as boys do!

Dominant means that the trait only needs to be present on one of the chromosomes to show up. So, if your mom has an X-linked dominant trait, like a disease or a certain eye color, and she passes her X chromosome with the trait to you, you will have that trait too, even if your other X chromosome doesn't have it. This is different from recessive traits, where you need to inherit the trait on both chromosomes to show up.

Overall, X-linked dominant inheritance just means that certain traits are carried on the X chromosome and only need to be present on one of the chromosomes to show up, and girls have more chances to inherit them than boys do. Does that make sense, kiddo?