Mendel hypothesized that gametes have only one factor or allele for each inherited trait. this hypothesis is supported by the observation that

Mendel hypothesized that gametes have only one factor or allele for each inherited trait. This hypothesis s supported by the observation that haploid cells are produced by meiosis.

Explanation:

Gregor Mendel is known as the father of genetics due to the fact that he discovered the fundamental laws of inheritance. Through his work on pea plants, the scientist hypothesized that genes come in pairs, and that gametes have only one factor or allele for each inherited trait. This hypothesis is supported by the observation that haploid cells (which are for example gametes that contain 23 chromosomes) are produced by meiosis. Meiosis is a special type of cell division process in which the chromosome number of the cell is reduced by half, creating four haploid cells. Mendel used this observation to create the hypothesis that stated that genes come in pairs and are inherited as distinct units, one from each parent.