Which of the following is one of Mendel's three hypotheses for explaining his observations?
a. The pairs of alleles remain together in the formation of gametes so that each gamete gets both alleles.
b. Adult plants always have traits that are governed by a single pair of alleles, but the number of possible alleles varies with each trait.
c. Adult plants carry a trio of genes that will determine the inheritance of each allele.
d. If an adult plant has two different alleles, the alleles blend.
Answer: b. Adult plants always have traits that are governed by a single pair of alleles, but the number of possible alleles varies with each trait.
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