They were ruthless killers for several causes.
That is the best I can do, this sentence is already fairly short.
An organism produced by asexual reproduction would more closely resemble its parent because an organism produced through asexual reproduction is created by the parent duplicating its genetic code and separating into two. Essentially the child is a duplicate.
Chromatin is the mass of DNA molecules which is undistinguishable however chromatids are part of a chromosome attached with a centromere. Also, chromatin is the DNA before it coils and chromatid are the things that contains the DNA.