Need help with Biology ?'s

Question

Which of the following traits cannot be studied using normal dominance in humans?

A characteristic that is derived from many genes is called

Which of the following traits is not polygenic for humans?

height

skin color

earlobe attachment

hair color

Answer 1

You haven't given us the options for the first question.

2) Polygenic.

3) Earlobe attachment.

Answer 2

The answer is EARLOBE ATTACHMENT.

It is NOT Polygenic for humans.

Check it out at:

http://en.wikipedia.org/wiki/List_of_Men...

POLYGENIC INHERITENCE is a type of inheritance, in which the complete phenotype of a trait is controlled by two or more genes.

The dominant alleles of each gene contribute to only a fraction of the trait, and the total phenotypic expression is a cumulative effect of all the dominant alleles of genes.

E.g., kernel colour of wheat, skin colour of human beings.

Human polygenic traits include:

1. Height

2. Weight (click here for an article about obesity and genetics)

3. Eye Color (click here for an article about eye color)

4. Intelligence

5. Skin Color

6. Many forms of behavior

"EARLOBE ATTACHMENT" is NOT Polygenic for humans.