Idk about chromosomes part of this post's context. But adding to the evolution part for anyone who's interested.
When cells divide and grow the genetic code isn't copied 100% correctly. There are errors, some get fixed some don't. The ones that don't get fixed and continue to exist are what we call cancer.
Genetic mutation is a random thing that just happens when cell divide and grow because of not 100% being copied exactly the same. If there is a mutation which gives the individual an edge over other beings of the same species then it becomes easier for them to survive and reproduce. As their offspring increase and the ones with this mutation absent die or have less offsprings we see what we know as "nature's selection"
anon525as t1_j4zidhj wrote
Reply to comment by deadcommand in Given that reproduction is difficult or impossible when both animals have different numbers of chromosomes, how did so many species evolve to have so many different numbers of them? by MercurioLeCher
Idk about chromosomes part of this post's context. But adding to the evolution part for anyone who's interested.
When cells divide and grow the genetic code isn't copied 100% correctly. There are errors, some get fixed some don't. The ones that don't get fixed and continue to exist are what we call cancer.
Genetic mutation is a random thing that just happens when cell divide and grow because of not 100% being copied exactly the same. If there is a mutation which gives the individual an edge over other beings of the same species then it becomes easier for them to survive and reproduce. As their offspring increase and the ones with this mutation absent die or have less offsprings we see what we know as "nature's selection"