Скачать с ютуб Chicken Genetics 5 - colour and pattern in chickens в хорошем качестве

Chicken Genetics 5 - colour and pattern in chickens

Continuing my series of videos about the genetics of chickens, this one is an introduction to the genetics of colour and patterns on chickens' feathers. Here is a link to the playlist:    • Chicken Genetics 1 - Basic chicken ge...   ------------------------------------------------------------------------------------- The GENETICS of COLOURS and PATTERNS in chicken feathers The colours of chicken feathers are caused by just two pigments - eumelanin and pheomelanin. The expression of these pigments in the feathers is affected by genes. And the patterns of colour are caused by genes, for example by diluting the colour or by restricting it to parts of the bird or parts of the feather itself. The Columbian (Co) gene acts on the bird as a whole, to make a pattern where the black eumelanin is expressed only only the hackle and tail. The Barring gene (B) turns the pigment on and off as the feather grows, causing black and white stripes on each feather. ------------------------------------------------------------------------------------------------------ The videos in this playlist start with an introduction to genetic terminology including dominance:    • Chicken Genetics 1 - Basic chicken ge...   The next one covers co-dominant genes:    • Chicken Genetics 2 - codominant blue ...   It's essential to understand the genetics of what makes a chicken male or female because it's different to mammals:    • Chicken Genetics 3 - sex genes - What...   before we look at sex-linked crosses:    • Chicken Genetics 4 - sex linked cross   ---------------------------------------------------------------------------------------------------- For more fascinating facts, hints and tips about caring for your chickens, and the sheer pleasure of chickens, subscribe to my channel: Chickens in my garden - New Zealand    / chickensinmygarden   Catch up with me on Facebook   / chickensinmygarden