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Which of the following statements regarding genotypes and phenotypes is false? 1 The genetic makeup of...

Which of the following statements regarding genotypes and phenotypes is false?

1 The genetic makeup of an organism constitutes its genotype.

2 Alleles are alternate forms of a gene.

3 The expressed physical traits of an organism are called its phenotype.

4. An organism with two different alleles for a single trait is said to be homozygous for that trait.

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