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Though all humans share the same basic body plan, each of us
(apart from identical twins) has a unique mixture of features.
That is because the set of instructions – called genes –
required to construct a human varies slightly
from person to person. Genetics is the study
of how the genes we inherit from our parents
shape the way we are.Genetics
1Eye colour is controlled
by specific genes, and
different versions of those
genes produce a range
of colours2082_083_Genetics.indd 82 10/01/19 2:26 PM