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.

## Step 1 problem is about Gregor Mendel's experiments on pea plants, which led to the formulation of his laws of inheritance. Mendel's work laid the foundation for the science of genetics. The question asks which of Mendel's hypotheses allowed him to analyze each trait separately in his experiments.

## Step 2
The first hypothesis, "If two different alleles for a gene occur together, one of the alleles may be expressed while the other is hidden," refers to the concept of dominance in genetics. This concept is crucial in understanding how traits are expressed, but it doesn't directly explain how Mendel was able to analyze each trait separately.

## Step 3
The second hypothesis, "When gametes are formed, each gamete carries only one allele for the gene," is a statement about the formation of gametes (sex cells) and the fact that each gamete carries only one allele for each gene. This is a key concept in understanding how traits are passed from parents to offspring, but it doesn't directly explain how Mendel was able to analyze each trait separately.

## Step 4
The third hypothesis, "There are alternate versions of a alleles called genes," is a statement about the existence of different versions of genes, known as alleles. This concept is fundamental to genetics, but it doesn't directly explain how Mendel was able to analyze each trait separately.

## Step 5
The fourth hypothesis, "For each inherited trait, there is only one copy of the gene that codes for that trait," is the correct answer. This hypothesis, known as the law of segregation, states that for each inherited trait, an organism has two alleles, one from each parent. These alleles segregate during the formation of gametes, so each gamete carries only one allele for each trait. This allowed Mendel to analyze each trait separately, as each trait was inherited independently of the others.