Chest pain refers to pain felt anywhere in the chest area from the level of your shoulders to the bottom of your ribs. It is a common symptom. There are many causes of chest pain. This leaflet only deals with the most common.
Answered by The WikiAnswersÂ® Community. Making the world better, one answer at a time. The Genes determine the nature of the cell's work....Each gene is a blueprint that directs the production. The Genes determine the nature of the cell's work....Each gene is a blueprint that directs the production.
Thus, in these cases the mother determines the sex of the offspring. Since cells in a male contain a single X chromosome and cells in a female contain two X chromosomes, females contain twice as many copies of the genes on the X chromosome per cell as do males.