Answer:
The youngest crust (shown in red) is near mid ocean ridges and spreading zones. All three rock types in the earth's crust—igneous, sedimentary, and metamorphic—can also be recycled back to their original molten magma form. This process occurs when oceanic crust is pushed back into the mantle at subduction zones.
Answer:
2
:2
Explanation:
<em>The genotypic ratio of expected of their offspring would be 2</em>
<em>:2</em>
<em>.</em>
From the illustration, the genotype of the man with male pattern baldness is
while the genotype of the woman without the baldness allele is
.
Crossing the two genotypes in marriage:
x 
Progeny:

<em>Hence, the genotypic ratio of the offspring becomes:</em>
2
:2