Fill the top portion of your chimney with charcoal briquets. Do not over-fill. Fill to just within a couple inches of the top rim. Crumple up two or three pieces of newspaper (depending on the size of your chimney) and wedge them in the bottom part of the chimney from below.
People with hemophilia are born with it. It is caused by a fault in one of the genes that determine how the body makes blood clotting factor VIII or IX. These genes are located on the X chromosome. To understand how hemophilia is inherited, it is important to learn about chromosomes.
In males (who have only one X chromosome), one altered copy of the gene in each cell is sufficient to cause the condition. In females (who have two X chromosomes), a mutation would have to occur in both copies of the gene to cause the disorder. Because it is unlikely that females will have two altered copies of this gene, it is very rare for females to have hemophilia.