Cells of the can contract without chemical synapses because of junctions.

I think Cells of smooth muscles can contract without chemical synapsis because of gap junction.

Smooth muscles can contract without chemical stimulus because they are involuntry and are not under concious control.

And Gap junctions allow the exchange of ions, second messengers, and small metabolites between adjacent cells and are formed by two unrelated protein families, the pannexins and connexins.

the principle of segregation describes how pairs of gene variants are separated into reproductive cells. from his data, mendel formulated the principle of segregation. we now know that the segregation of genes occurs during meiosis in eukaryotes, which is a process that produces reproductive cells called gametes.