Why is there a white dot on an egg yolk?

Answer 1

The white dot on the yolk is the blastodisc, or where the chick embryo would form if it were fertilized. If you're talking about the strands that look like tails on the yolk, those are the chalazae that keep the yolk in place in side the egg.

Answer 2

That white dot on the egg yolk is the embryo of a chick that was supposed to form in the egg before that egg was taken away from the hen and put into cold temperatures to halt such growth from occurring. This white dot is there because that's how chicks come about: The ovum is attached to the yolk of the egg as it is released, and once fertilized by the sperm from a rooster, the albumin and shell form in the hen before being laid.

Answer 3

It is a germinal disc or a blastodisc.

It is the to be fertilized, of which when fertilized is called blastoderm, embryo of the egg that feeds on the egg yolk.

The above answer is quite correct, however, if you are referring to a chicken egg you just broke into a frying pan then perhaps what you are looking at is a chalaza. Chalaza is a protein strand (there are two of them). They are used to hold the yolk at the center of the Albumen (egg white). These chalaza can be broken when the egg is cracked into a pan and appear on top of the yolk. It will disappear when the egg is cooked and does not affect the quality or appearance of the cooked egg.

Answer 4

the food the hen eats. the lighter the food the bird eats the lighter the color of the yolk.

Answer 5

Different types of feed. Corn tends to make the yolk a lighter colour whereas barley or rye makes it a little darker, for example.