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.
Confidence votes 87. Mars is roughly 1.5 Astronomical Units (AU) from the Sun (1 AU is the distance from the Sun to the Earth). In ball park estimates, it takes 8 minutes for light to travel 1 AU. So when Mars is at the closest to Earth at 0.5 AU, Mars is 4 light minutes from Earth. The farthest distance Mars is from Earth is 2.5 AU, when Mars is on the other side of the Sun from Earth (1 AU from Earth to the Sun + 1.5 AU from the Sun to Mars). At that distance Mars is 20 light minutes from earth.