the gender gap refers to
a. a comparison of the numbers of male to female voters
b. split-ticket voting
c. the differences in the voting patterns of men and women
d. loyalty to a political party
a
You may be right, but a good argument could be made that the gender gap refers to the differences in men's and women's voting patterns. Please check your text to see how its author interprets this term.
http://www.now.org/issues/election/elections2004/041112womensvote.html
http://www.jofreeman.com/polhistory/gendergap.htm
http://www.apsanet.org/content_5270.cfm