Genetics of Egg Color in Chickens
Chickens lay eggs in a variety of colors: white, brown, olive, green, blue, and many shades in between. The color of a chicken's egg depends on their genetic makeup. In this article, I will be exploring the genetics behind the egg color in chickens, specifically focusing on white, brown, and blue eggs. Three pigments are known to be responsible for the color of chicken eggshells: protoporphyrin, biliverdin, and biliverdin-zinc chelate . White eggs tend to have very little protoporphyrin, but in brown eggs, the main pigment is protoporphyrin. Later, I will go through an in depth analysis of the genes that are read to create the pigment. Blue egg color is a bit more complex as the phenotype arose only 200-500 years ago in the South American Mapuche fowl. Recent research has shown that blue egg color in chickens is actually due to an ancient retrovirus that copied itself into the chicken's genome. Source: https://onlinelibrary-wiley-com.libproxy.kenyon.edu/doi/abs/10.1111/asj.12182 Source 2: https://www.sciencedaily.com/releases/2013/08/130820083654.htm
Select a topic about genetics or evolution in a specific organism or ecosystem.
The topic must include one section about microbes (bacteria, viruses, fungi, or protists). This is easy because all organisms and ecosystems have microbes.
Compose a title for your page.
Type your exact title in the Search window, then press Go. The MicrobeWiki will invite you to create a new page with this title.
Open the BIOL 116 Class 2019 template page in "edit."
Copy ALL the text from the edit window.
Then go to YOUR OWN page; edit tab. PASTE into your own page, and edit.
At right is a sample image insertion. It works for any image uploaded anywhere to MicrobeWiki. The insertion code consists of:
Double brackets: [[
Thumbnail status: |thumb|
Pixel size: |300px|
Placement on page: |right|
Legend/credit: Electron micrograph of the Ebola Zaire virus. This was the first photo ever taken of the virus, on 10/13/1976. By Dr. F.A. Murphy, now at U.C. Davis, then at the CDC.
Closed double brackets: ]]
Section 1 Genetics
Include some current research, with at least one image.
Section 2 Microbiome
Include some current research, with a second image.
Overall text length should be at least 1,000 words (before counting references), with at least 2 images. Include at least 5 references under Reference section.
- Zheng, C. , Li, Z. , Yang, N. and Ning, Z. (2014), Candidate Genes Affecting Eggshell Color. Animal Science Journal, 85: 506-510. doi:10.1111/asj.12182
- Hodgkin, J. and Partridge, F.A. "Caenorhabditis elegans meets microsporidia: the nematode killers from Paris." 2008. PLoS Biology 6:2634-2637.
- Bartlett et al.: Oncolytic viruses as therapeutic cancer vaccines. Molecular Cancer 2013 12:103.