This is what I wrote over on FTM's Genealogy Software Board:
Re 2 separate individuals for Renée: I would start out with birth name (born Richard Raskind August 19, 1934, in New York City -- from Wikipedia), then add alternate name with the preferred box checked. In both FTM and RM, there is the drop-down box for Male, Female & Unknown.
But, to test your question for 2 individuals
Edit "test King" above to change name to Joseph King and to select Male from drop down box
(Displays "M" in family view)
Add "Jane King" Female as non-connected individual
("King" not a good surname to use with single letter given names! -- A King, C King)
Choose the female as the Primary Record
Click button "Merge duplicate into primary"
Error: "The primary and duplicate records must be the same sex. "
This test is in RM. I haven't tested FTM.
So, c'mon Bruce, if it's not already programmed for V4 , give Renée's and Christine's family genealogists the wherewithall to create their whole family trees.