Aetna CEO: Obamacare In A 'Death Spiral' Heading Into 2018. Aetna and Humana have called off their deal amid government concerns over competition. Here's a look back at six pivotal moments that led to this. Aetna and Humana have called off their deal amid government concerns over competition.
For the plant genus, see Synapsis (plant). Synapsis (also called syndesis) is the pairing of two homologous chromosomes that occurs during meiosis. It allows matching-up of homologous pairs prior to their segregation, and possible chromosomal crossover between them. Synapsis takes place during prophase I of meiosis.
2. Independent assortment of homologous maternal and paternal chromosomes during metaphase I results in gametes that have different combinations of parental chromosomes. **the way they line up at metaphase I** 10. Explain why synapsis may lead to the exchange of genetic information. Synapsis is when homologous chromosomes pair up, chromosomes are close enough for âcrossing overâ to occur, resulting in the exchange of genetic information. 11.