Yes I have a brother who is 2 years younger than me, you can tell were related, we look quite similar! We also do quite similar things in our jobs – writing computer programs to work things out, although he isn’t a scientist.
Yes, I have an older sister called Heather. We are complete opposites, we look nothing alike, our personalities are totally different and we work on totally different things – Im a scientist, and she studied art and now teaches kids with learning difficulties or behavioural problems. I think sometimes people are surprised that we are related at all!!