How to ask about gender

When asking the question about gender we need to take into account the persons identifying gender but still need to know their biological gender.

I would like to understand to best combination of questions to get to this.

The current system is just Male / Female and we don't the people who just use that have extra to click.

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I was thinking of changing this first to biological gender and adding a third option to allow the user to show that their identifying gender is different.

Or alternatively a second question is "This your identifying gender" but then everybody would have to answer it.

What is and ideal sequence of question and answers to determine both biological gender and identifying gender

Also considering mobile vs desktop