So below, for your kind reference, is a bunch of DNA strands

My question is, can you point to the dark purple areas and say, with confidence, that

'that portion of DNA strand is the dna that controls skin colour'

or that little bit of light purple in the 5th section is  the part that controls hair colour 

etc etc?

 

 

 

1 hour ago, Thenudist said:

So below, for your kind reference, is a bunch of DNA strands

My question is, can you point to the dark purple areas and say, with confidence, that

'that portion of DNA strand is the dna that controls skin colour'

or that little bit of light purple in the 5th section is  the part that controls hair colour 

etc etc?

 

 

 

This sheds some light on your question: https://knowyourdna.com/skin-color-genes/

5 hours ago, exchemist said:

This sheds some light on your question: https://knowyourdna.com/skin-color-genes/

only partially;

my question was, 

can you determine, what part of a DNA strand, controls a certain physical attribute?

For example, in the DNA strand below, what physical attribute does the first pink section represent? 

No, especially since gene expression is environmentally dependent 

53 minutes ago, Thenudist said:

only partially;

my question was, 

can you determine, what part of a DNA strand, controls a certain physical attribute?

For example, in the DNA strand below, what physical attribute does the first pink section represent? 

I think the point of the link I provided is that in general a given characteristic may result from more than one bit of DNA. So there is not a  one-to-one correspondence, in the way you were enquiring about. But I'm just a chemist, so not an expert on this stuff. There may be others here who can explain better.