Friday, May 19, 2017

Genetics: Incomplete Dominance - Skylar Oliver



Main Ideas:

- Incomplete dominance is when organisms with two different phenotypes cross to produce an offspring which has a third phenotype, the offspring displays a blend of the parental traits.

- Incomplete dominance is an example of non-Mendelian genetics that implies that there is no trait that is dominant over the other. 

- The overall thing you have to remember is that offsprings are a mixture of the of both parents. (Ex: red + white flower = pink flower)

Punnet square:

- You can still use a Punnet square to solve problems involving incomplete dominance. The only difference is that instead of using a capital letter for the dominant trait & a lowercase letter for the recessive trait, the letters you are both going to be capital (because neither trait dominates the other). 

- You also use apostrophes to decipher between your different traits since both are capital. 

- ( Ex: Red = R  and White = R',  Pink = RR')

The trick is to recognize when you are dealing with a question involving incomplete dominance. 

There are two steps to this:

1.) Notice that the offspring is showing a 3rd phenotype. The parents each have one, and the offspring are different from the parents.

2.) Notice that the trait in the offspring is a blend (mixing) of the parental traits.


Reflection: Overall this was a simple topic that I mainly knew about from class. I find that genetics are very interesting and how many different combinations you can get when combining two phenotypes together. You can use incomplete dominance outside of biology when you are trying to determine what you flowers are going to look like when you are gardening or what kind of traits you can expect to receive when breeding different animals. 


Citations

- Class notes from Mr. Black

"Incomplete & Codominance". Hobart.k12.in.us. N.p., 2017. Web. 19 May 2017
"Dominance (Genetics)". En.wikipedia.org. N.p., 2017. Web. 19 May 2017.

1 comment:

  1. I like your picture, and the amount of detail you used.

    ReplyDelete