yellow

Police Scotland has urged drivers not to take to the road on Saturday - with further yellow warnings for snow, wind and rain covering most of the country.

The researchers studied how a gene called yellow is regulated in the fruit fly Drosophila.

There are a number of enhancers that control the activity of yellow.

The young birds appear brown all over and it is not until their fourth or fifth year that they develop a white tail and yellow bill.

An amber warning for snow and ice has been issued for central Scotland and numerous yellow warnings for rain and wind are in place for Saturday and Sunday.