CHromosom is mado chromatids. Chromatids have a lot of thriplets inside. Every thriplet is one gene. Allele is also different variant of gene
Using the telescope, Galileo discovered the mountains on the moon, the spots on the sun, and four moons of Jupiter. His discoveries provided the evidence to support the theory that the earth and other planets revolved around the sun.
Air gets thinner as we go higher because there are less trees and gets thicker on ground level because of the abundance of vegetation.
Water is not condensed on the surface because it doesn't have any pressure acting on it vertically but gets condensed as we go deeper because its own weight acts as a force.
Both scenarios are similar.
