GCSE Biology – DNA Part 2 – Alleles / Dominant / Heterozygous / Phenotypes and more! #49

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Published on January 7, 2019 by

There are load of terms to know about DNA, and in this video we explain all the main ones - genes, alleles, homozygous and heterozygous, dominant and recessive, genotype and phenotype. Along the way we'll see how genes and inheritance really works!

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11 Comments

  • Hiren Ramanlal 3 years ago

    Good vid helped me a lot ty ty ty tyπŸ€œπŸΏπŸ€œπŸΏπŸ€œπŸΏπŸ€œπŸΏπŸ€œπŸΏπŸ€œπŸΏπŸ€œπŸΏπŸ‘‰πŸΎ

    • Cognito 3 years ago

      Very happy to hear it – you’re welcome!! πŸ‘

  • DarkSoaR 3 years ago

    i disliked for no reason….

    good vid though lmao

  • Maronia Duca 2 years ago

    Really helpful, THANK YOU!

  • Spicey Blue Royal Honey 2 years ago

    wait so why do mix raced children not have just one of the parent’s skin colour but have a mix of it?

    • Spicey Blue Royal Honey 2 years ago

      @WitheredGurl uwu maybe he won’t answer me because it’s been a year.

    • Weally plstop 2 years ago

      @Spicey Blue Royal Honey bruh mode

    • Athar Tawfique 2 years ago

      Skin tone is determined by percentage of melanin in the skin cells so i think that it just varies it doesnt work like dominant recessive but usually leans towards one of the two

    • Amrita Mallick 2 years ago

      That’s because human skin colour (phenotype) is controlled by multiple genes, and not just a single dominant allele of a gene. Skin colour in higher animals like humans, is a Polygenic trait.

    • Spicey Blue Royal Honey 2 years ago

      @Amrita Mallick thanks I guess that’s a bit helpful.

  • Mahmoud S.shine 2 years ago

    great job .. you have a site for more videos ?

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