YOU SAID:
what gender of the 20 are you?
INTO JAPANESE
あなたは20歳のどの性別ですか?
BACK INTO ENGLISH
Which gender are you 20 years old?
INTO JAPANESE
あなたは20歳の性別は何ですか?
BACK INTO ENGLISH
What is your 20 year old gender?
INTO JAPANESE
あなたの20歳の性別は何ですか?
BACK INTO ENGLISH
What is your 20 year old gender?
That didn't even make that much sense in English.