Fraternal twins may or may not have similar personalities. Similar personality traits can stem from being raised in the same home environment with shared experiences and schooling, rather than the fact that they are fraternal twins, according to twins and multiples expert Pamela Prindo Feirro.

Fraternal twins may also exhibit completely different personalities, despite being raised in the same environment. They may have inherited different genes or been exposed to different life experiences. Some personality traits, such as being extroverted or introverted, are partially inherited, notes the Global Post. Fraternal twins may also look very different and consequently dress differently so that their individuality, rather than their similarities, is emphasized.