One of Gregor Mendel's contributions to genetics was his discovery that traits are inherited as discrete units.
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Q39: Any factor that contributes to the change
Q40: The example of the sickle-cell allele demonstrates
Q41: Natural selection is the only mechanism driving
Q42: Balanced polymorphism refers to two or more
Q43: Mendel's concept of independent assortment is based
Q45: Genotype refers to expressed physical traits based
Q46: Mutations introduce genetic variation into a gene
Q47: Natural selection operates directly on the genotype
Q48: The HbS allele has been maintained in
Q49: Genetic evolution involves changes in gene frequencies
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