Keisha has inherited one recessive gene for the sickle-cell trait along with one normal dominant gene. as a result of this she is resistant to malaria and does not have sickle-cell anemia

Keisha has inherited one recessive gene for the sickle-cell trait along with one normal dominant gene. as a result of this incomplete dominance she is resistant to malaria and does not have sickle-cell anemia

Keisha have a dominant gene which should be expressed over the recessive gene. But the gene is not fully expressed. This condition could happen because the gene incomplete dominance, which make it not fully expressed if there is only one gene. The result of heterozygotes would be less than homozygote dominant.

answer and explanation;

volcanic rocks are igneous rocks which form from lava, molten rock which has been thrust out of a volcano onto the surface of a rocky body such as an asteroid, planet, or dwarf planet.  

plutonic rocks are igneous rocks which form from subterranean chambers of molten rock or magma. plutonic rocks make up the base of continental crust as well as oceanic crust. their slow rate of formation causes them to be coarse grained since there is plenty of time for large crystals to form before the magma solidifies into rock.

the textural difference is that plutonic rocks are more coarse grained than volcanic rocks. plutonic rocks are coarse grained while volcanic are fine grained ; glassey or fragmental. since fine and coarse are adjectives the decision as to whether a rock is fine or coarse grained is generally made on the bases of whether or not the individual crystals can be seen in most if the rock.