The annual cost of asthma is estimated to be $56 billion.3. Direct costs accounted for nearly $ 50.1 billion (hospitalizations the single largest portion of direct cost) and indirect costs of $ 5.9 billion (lost earnings due to illness or death).8.he annual cost of asthma is estimated to be $56 billion.3. Direct costs accounted for nearly $ 50.1 billion (hospitalizations the single largest portion of direct cost) and indirect costs of $ 5.9 billion (lost earnings due to illness or death).8.
What is a chromosome? In the nucleus of each cell, the DNA molecule is packaged into thread-like structures called chromosomes. Each chromosome is made up of DNA tightly coiled many times around proteins called histones that support its structure. Chromosomes are not visible in the cellâs nucleusânot even under a microscopeâwhen the cell is not dividing.
DNA is made up of four base chemicals, adenine, guanine, cytosine and thymine. These pair with each another to form a double-helix structure. DNA is passed down from parent to child through chromosomes. Each human cell has 46 chromosomes, half inherited from the mother and half from the father.