Albinism is a recessive disorder in which the skin and hair fail to produce pigment.The following question(s) ask you to evaluate the pedigree chart shown here in which "N" is the allele for normal pigmentation and "n" is the allele for albinism.The shaded circles for Deirdre and Shannon represent the only individuals expressing the disorder. 
-What is Deirdre's phenotype?
Definitions:
Basalt
A dark, fine-grained volcanic rock that forms from the rapid cooling of magnesium and iron-rich lava.
Magma Systems
Network of underground magmatic bodies and pathways that feed volcanic eruptions, including magma chambers and conduits.
Magma Chamber
A region below a volcano where molten rock (magma) accumulates.
Molten Rock
Rock heated to a liquid state by extreme temperatures, found in the Earth's mantle and crust, also known as magma when underground and lava when it reaches the surface.
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