John and his mother both have brachydactyly. John and his father both have Huntington disease. Both traits are rare and autosomal dominant. Johb's wife is phenotypically normal and is pregnant. Two-thirds of people who inherit the huntington allele show symptioms by age 50, and brachydactyly is 90% penetrant. Genotyping of the fetus reveals that the fetus has the huntington allele. What is the probability that the child will express both brachydactyly and Huntington disease by age 50 if two genes are 10 m. u. apart

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if you insert the diagram ill be able to you

the answer is a) cell division.

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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.