DOMINANT AND RECESSIVE INHERITANCE By: Shelby J-S & Kaylin P.

GENES  Dominant genes- The trait that is normal and most likely to appear. A dominant gene is shown by a capital letter. ‘B’  Recessive- The trait that is different or rare but, less likely to appear. A recessive gene is shown by a lower case letter. ‘b’

HOW THEY MATCH UP  If a dominant gene matches up with a recessive you get the dominant trait.  If two dominant genes match up, you still get the dominate trait.  If two recessive genes match up you get the recessive trait. This is the only way to get a recessive trait.

PUNNETT SQUARE  Punnett squares are used when parents want to find out the traits of there baby, in other words it’s a chart that helps predict traits of off spring.  What makes up a punnett square is each parent has two alleles to make up a trait. Each of there traits are put on the outsides of the square and depending on what there traits are is what the inside of the square shows.

EXAMPLE OF PUNNETT SQUARE  The letters on the other side of the square are the parents, and they bot have the dominate trait.  The letters on the inside of the square are the traits of the child.  They have the dominate trait no matter what because dominant always covers recessive. BB Bb B B B b