Why did The One needed to choose an unequal number of males and females?

The Architect says that The One must choose 23 people (16 female, 7 male) to create new Zion.

After which, you will be required to select from the Matrix 23 individuals - 16 female, 7 male - to rebuild Zion.

At first, it seems unfair for males, but again, wouldn't females go haywire if current nature (of sense of security in relationship) is taken into account?

Why exactly this unequal number was chosen? Even if you see females more important in reproduction, you just need one male (or, an extra for backup, in case).