How do the homologous chromosomes compare to each other ?

The two chromosomes in a homologous pair are very similar to one another and have the same size and shape. Most importantly, they carry the same type of genetic information: that is, they have the same genes in the same locations.

Explanation:

answer; i believe that the correct answer is(d) nondisjunction during meiosis;

i'd say that the moon rock is about 2.2 billion years old.