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.
Humans have 46 chromosomes composed of 23 chromosome pairs in every cell nucleus. One half of each pair is contributed by the father, one half by the mother. Chromosomes can be pictured as strings of beads which are genes.