Do male and female legislators have different qualifications, experience, and backgrounds? If so, what are the main differences and what explains these differences? Are women more likely to rely on personal connections? Are well qualified women routinely passed over in favor of similarly qualified men? Do gender quotas and transitions to multiparty democracy affect the recruitment patterns of men and women? Do gender quotas lead to the recruitment of less qualified women? This article attempts to explain how informal gendered selection norms change over time using detailed data from over 500 Mexican Senators since 1964. The data provide evidence of discrimination in that to be successful, female senators need to have more legislative experience and more party experience than male senators. We also find evidence that traditional gender roles lead women to follow different paths to power. After the transition to democracy and the implementation of gender quotas, the importance of local legislative experience increased, discrimination against female aspirants declined, and a more diverse group of women entered the Senate. Our data show that women are no more likely than men to rely on personal connections to get into power.