Psychology Glossary. Genotype. The total set of genes contained within an organisms cells. Organisms contain some genes that are expressed (you can consider the expressed to mean that the gene is active or being used) and some that are not. Regardless, all the genes an organism has are considered the genotype.
Mars' closest approach to the Earth is called opposition, and occurs roughly every 780 days.
Taking a number of observations, we find an average time between oppositions to be 780 days: So if Mars and Earth are side-by-side every 780 days, let's figure out how long it takes for Mars to go around exactly once. We know that in 780 days, the Earth has revolved around the sun twice in 730 days, with 50 days left over. In those 50 days, the earth goes around the sun 50/365 of an orbit.