Oil 2 hydro electric 3 nucler power 4
Examining fossil and pollen records Extracting deep ice cores from glaciers and the polar ice caps Examining growth rings on trees All of these methods provide clues to past temperature, precipitation, and wind patterns as well as the chemical make-up of the atmosphere.
Answer:
= 
Explanation:
Given that the woman’s maternal grandfather is color-blind, then it is possible that the woman is a carrier of color-blind allele.
Then probability that the woman is a carrier of color-blind allele is =
So if a carrier woman cross with a normal man
Let say the gene of the carrier woman is: 
and the normal man = 
so if we have a cross between
and
; we have:



we can see the offspring to be :
=normal unaffected female
= normal unaffected male
= carrier female for color-blind
= carrier male for color-bind
Then probability that of inheriting defective allele =
= 
Let's not forget that the probability that the woman is a carrier of color-blind allele is =
∴ the probability that the son is colorblind = 
= 
The answer is c. Hope this helps you
Correct me if I’m wrong but I THINK it’s Mitochondrion