What determines what color an eggshell is? DNA plays a major role.
In everyday life we are not particularly interested in them, and it is only at Easter when they start to attract our attention. Then we like to paint them, transforming them into Easter eggs. But is it necessary? Hen eggs can have very different colors by nature.
Eight thousand years ago in the jungles of southern Asia lived a small bird that made its nests in thickets and fed in open areas. The male had a distinctive red crest and a shiny black tail. The female was smaller and more uniformly colored. She laid 8 to 12 eggs, from which chicks hatched after only three weeks.
The fact that these birds flew infrequently and rather low, and that their eggs were nutritious, probably encouraged our ancestors to domesticate them. Today they have a scientific name — they are the banked hen (Gallus gallus). The banked hen is believed to be the ancestor of the domestic hen.
How many breeds of hens are there in the world?
If you look at the numbers, chickens have achieved great evolutionary success. Currently, there are almost twenty billion of them on Earth. However, for the absolute most part, they are animals raised by humans for food. They bear little resemblance to their colorful ancestor — these are white hens of the Leghorn breed.
