The pedigree chart below shows the individuals in a family who exhibit a certain trait. Based on the information in the chart, what is the characteristic of this trait?
It is a dominant trait.
It is a recessive trait.
The trait is incompletely dominant.
The trait is X-linked.

Question

The pedigree chart below shows the individuals in a family who exhibit a certain trait. Based on the information in the chart, what is the characteristic of this trait?
		It is a dominant trait.
		It is a recessive trait.
		The trait is incompletely dominant.
		The trait is X-linked.

anonymous · Answer

http://go.flvs.net/courses/1/flvs_30_3640_10579/ppg/respondus/pool_BioI_3640_0310_09/image0014e3c0638.jpg

blues · Answer

It helps us if you explain what about the problem you don't understand - the science, the problem solving technique, what?

You should use process of elimination for this. Do any of the options strike you as being most likely (and why)? Do any of them strike you as being not right (and why?)

anonymous · Answer

I don't fully understand pedigree charts. They confuse me. I don't think the answer could be #3 or #4. So that would leave it to either #1 or #2?

blues · Answer

Pedigree charts are like a family tree, where the individuals with a certain trait are colored in and the individuals without it are not colored.

I agree with you. It cannot be 3 because incomplete dominance happens when heterozygotes express a little of the dominant phenotype but not all of it - as clearly none of the people in the chart do. And it cannot be 4 because 4 is sex linked, and women have it as well as men. If it were sex linked, it would likely be just men.

If the allele is recessive, then two unaffected parents can have an affected offspring. Look at individuals 4, 5 and their child, 1.

anonymous · Answer

So, its #2. A recessive trait

anonymous · Answer

??

blues · Answer

Yes, I agree. :D

anonymous · Answer

Thank you so much! :)