On the other hand, there is a difference between those fraternal twins and the siblings, suggesting that there are common exposures for those fraternal twins that may not be shared as commonly with siblings alone.
Di sisi lain, ada perbedaan antara kembar non-identik dan saudara kandung, yang mengesankan bahwa kembar non-identik terekspos hal yang sama yang tidak selalu mengekspos pada saudara kandung bukan kembar.