1. Color Blindness Objective 12 Morgan Gabrysch

2. Explanation of the Color Blindness Gene  Color blindness is a X-linked trait.  There are two forms of the color blind gene, the working version and the nonworking version.  If you have the working version, you can see red from green, but if you have the nonworking version, you can’t.

3. Gene Inheritance  For color blindness, you only need one working version of the gene to tell red from green.  Girls have two X chromosomes, while boys have a X and a Y. This means that girls can have two working versions of the gene, while boys only have one.  Girls can have a nonworking gene and still see red and green because they still have another X chromosome with a working gene. Color blindness is X linked recessive because of this.  Boys who have a nonworking gene are color blind because they only have one X chromosome.

4. Example of Inheritance  Carrier women and a man that can tell red from green have kids. These are the four possibilities of the kids in terms of their X and Y chromosomes.  Red X means working gene, and gray X means nonworking gene.

5. Example of Inheritance  A carrier mom and a color blind dad have kids, and these are the four possibilities.

6. Example of Inheritance  A color blind mom and a color blind dad have kids, and these are the four possibilities.

7. How color blind people see things. What people with a working color blindness gene see. What people with a nonworking color blindness gene see.