「似てないわよね」「二卵性だからね」

「」「」

'They don't really look alike, do they.' 'No, they're fraternal twins.'

Literal

''Not-resembling is [feminine-わよね]'' ''fraternal-twins is-[because-から][feminine-ね]''

A quick exchange about twins. 二卵性 ('two-egg type') is the medical term for fraternal/dizygotic twins, as opposed to 一卵性 (identical/monozygotic). The implied noun is 双子 (twins). 似てない is casual for 似ていない ('not resembling'). わよね and だからね are soft feminine sentence endings, typical of women's speech.