Thank You Notes For Coaches Can A Male Singer With An Alto Range Expand His Range Enough To Hit Notes In The Whistle Register?

Can a male singer with an alto range expand his range enough to hit notes in the whistle register? - thank you notes for coaches

I am a singer 21 years old and wide ranges from mezzo-soprano, but I wonder, can expand with proper training by a teacher or coach my vocal range, to take notes Whistle register? Mariah Carey I know that car can be identified - as a contralto singer, but register.So able to sing in the whistle do the same? Thank you for taking the time to read and answer my question.