"Do you have an older brother?"
I heard that you can also make questions by putting the verb + 没 + verb
so could i ask this question also with 你的哥哥 有没有？
//edit: order was wrong, it should be: 你有没有哥哥？"do you have a brother"
the original would be "does your brother have ..." which is nonsensical.
哥哥 means specifically "older brother" 弟弟 is the corresponding "younger brother"
In Chinese, you can have up to 4 siblings hahaha =P
妹妹 younger sis 姐姐 older sis
姐妹 for referring to both your sisters (older and younger) 兄弟 for referring to your brothers
This pattern repeats when referring to your uncle and aunts and cousins and all! I suggest you search for Chinese family tree diagrams online, it's quite complicated! But don't stress too much about it, your loved one will surely teach you all about it before a family gathering!