Cialis redirects here. For the Central Asian kingdom, see Karasahr. Tadalafil (INN) is a PDE5 inhibitor marketed in pill form for treating erectile dysfunction (ED) under the name Cialis see-AL-iss, and under the name Adcirca ad-SUR-kuh for the treatment of pulmonary arterial hypertension.
Quick Answer. The synapsis process occurs in the prophase I stage of meiosis. In synapsis, replicated homologous chromosomes link, which become known as a tetrad. Crossover between two pairs of tetrads can occur at any time. Continue Reading.
In telophase I of meiosis, the following events occur: 1  The spindle fibers continue to move the homologous chromosomes to the poles. 2  Once movement is complete, each pole has a haploid number of chromosomes. 3  In most cases, cytokinesis (division of the cytoplasm) occurs at the same time as telophase I.