Is this topic sentence clear enough? Or is it too broad? If so, could I get some guidance, Im lost. This is for a comparaison/contrast paragraph.

"To share the same blood type and genetic material does not ensure that two people will be exactly alike, as it is true for my sister and I."

3 answers

Do you mean a topic sentence (for one paragraph)? Or do you mean a thesis statement (for an entire paper or essay)?

As a topic sentence, this is fine. (It wouldn't be for a thesis statement, though.)
Its only a paragraph assignment so it only needs a topic sentence. What I was wondering was if I need to include the points of comparison in the topic sentence.
No, you don't need to. Those points of comparison will show up clearly in your paragraph if you organize it carefully. Your sentence is fine!

=)