Hellow guys, Welcome to my website, and you are watching GCSE Biology - DNA Part 2 - Alleles / Dominant / Heterozygous / Phenotypes and more! #64. and this vIdeo is uploaded by Cognito at 2019-01-07T05:26:20-08:00. We are pramote this video only for entertainment and educational perpose only. So, I hop you like our website.