Question

mendel was able to study seven traits in all the pea plants in each generation. which of his hypotheses allowed him to analyze each trait separately? if two different alleles for a gene occur together, one of the alleles may be expressed while the other is hidden. when gametes are formed, each gamete carries only one allele for the gene. there are alternate versions of a alleles called genes. for each inherited trait, there is only one copy of the gene that codes for that trait.

Explanation:

Mendel's law of segregation states that when gametes are formed, each gamete carries only one allele for each gene. This allows traits to be studied separately. The other statements are incorrect interpretations of genetic concepts. Alternate versions of a gene are called alleles, not the other way around as stated in one option. Also, for each inherited trait, an organism has two copies of the gene (one from each parent in diploid organisms), not one as stated in another option. And different alleles for a gene do not always occur together in a way that one is always expressed and the other hidden in the simplistic manner described in the incorrect option.

Answer:

When gametes are formed, each gamete carries only one allele for the gene.