Why do chromosomes condense at the start of mitosis?

At which location in earth’s interior does the top density continue to increase as thickness decreases?

In a cross between individuals of a species of tropical fish, all of the male offspring have long tail fins, and none of the females possess the trait. mating two of the f1 fish fails to produce females with the trait. explain the inheritance pattern of the trait.

Match with o for organic and i for inorganic for each compound