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.
The planet that is closest to Earth depends on where the other planets are in relation to Earth. Venus can come the closest when it is on the same side of the Sun as the Earth â¦ , but Mars can be closest when Venus is on the far side of the Sun and Mars is on the same side of the sun as Earth.