Asthma runs strongly in families and is about half due to genetic susceptibility and about half due to environmental factors (8, 9). The strong familial clustering of asthma has encouraged an increasing volume of research into the genetic predisposition to disease.

A person may have a genetic tendency toward asthma but never actually develop it. Genetics play less of a role in asthma development later in life, so adult-onset asthma and occupational asthma are less dependent on genes. A person can also develop asthma without any genetic predisposition for the condition.

Factors in your environment can range from chemicals in air or water pollution, mold, pesticides, diet choices, or grooming products. Subtle differences in one person’s genes can cause them to respond differently to the same environmental exposure as another person.

Environmental factors such as pollution, sulfur dioxide, nitrogen oxide, ozone, cold temperatures, and high humidity are all known to trigger asthma in susceptible individuals. In fact, asthma symptoms and hospital admissions are greatly increased during periods of heavy air pollution.

Environmental factors which cause asthma are those that induce airway inflammation with eosinophils (more common) or neutrophils along with airway hyperresponsiveness (AHR). The most common of these (indeed the most common cause of asthma) are IgE-mediated inhalant allergen exposures.

Like most aspects of human behavior and cognition, intelligence is a complex trait that is influenced by both genetic and environmental factors. Elements of intelligence include the ability to reason, plan, solve problems, think abstractly, and understand complex ideas.

Your genes hold the basic instructions for your body to grow and function, but they are far from the only thing controlling your traits. Most traits are shaped both by a person’s genes and by environmental factors. Environmental factors include everything outside of DNA that affects your traits.

If a parent and a grandparent have asthma, a child is four times more likely to develop asthma. Having parents and siblings with asthma also highly increases a person’s risk of getting asthma. Children with just a grandparent with asthma were only slightly more likely to have asthma.

Asthma tends to run in families. Family history is one factor that is often overlooked. Asthma is caused by many different genes that you inherit from your parents, interacting with the environment. Other important risk factors include allergies, respiratory infections, and exposure to secondhand smoke.

Asthma is a complex genetic disorder in which the mode of inheritance cannot be classified as autosomal, recessive or sex-linked. Moreover, it is clear that the development of asthma can be attributed to both genetic and environmental factors.

However, genetics are not the only cause of asthma. Some people develop it when they have no family history of the condition. Likewise, a person may have a genetic tendency toward asthma but never actually develop it.

Your inherited genetic makeup predisposes you to having asthma. In fact, it’s thought that three-fifths of all asthma cases are hereditary . According to a CDC report, if a person has a parent with asthma, he or she is three to six times more likely to develop asthma than someone who does not have a parent with asthma.

Asthma is hereditary . Genetic researchers have learned that most genes are the same in all people, although about one percent are unique, making every person unique. Some of these unique genes are asthma genes, and they are handed down from parent to child, proving Hippocrates was right all along.

Asthma is a chronic disease of the air passages in the lungs. The actual cause of asthma is not known. Asthma experts believe that a combination of genetic and environmental factors can cause asthma or at least increase sensitivity to asthma triggers.