Definitively, sexual identity is difficult to pin down. Biological sex is usually easy to ascertain. The doctor normally congratulates the parents on a bouncing baby boy or a beautiful baby girl. Of course, there are situations in which a visual determination is not always possible. At these times, chromosomal sex is determined.
Gender identity is basically one's conviction of being male or female.
This is not contingent upon biological sex. Social sex-role is primarily gender role. It refers to the socially ascribed to characteristics of what is masculine and what is feminine. This model allows for both fantasy and behavior. I am suggesting that it does not.