The word allele is a short form of allelomorph (other form, a word coined by William Bateson and Edith Rebecca Saunders), which was used in the early days of genetics to describe variant forms of a gene detected as different phenotypes.
Causes. Male sexual arousal is a complex process that involves the brain, hormones, emotions, nerves, muscles and blood vessels. Erectile dysfunction can result from a problem with any of these. Likewise, stress and mental health concerns can cause or worsen erectile dysfunction.Sometimes a combination of physical and psychological issues causes erectile dysfunction.For instance, a minor physical condition that slows your sexual response might cause anxiety about maintaining an erection.rectile dysfunction can result from a problem with any of these. Likewise, stress and mental health concerns can cause or worsen erectile dysfunction. Sometimes a combination of physical and psychological issues causes erectile dysfunction.
Causes of erectile dysfunction. Erectile dysfunction (ED) can have many causes, such as certain medical conditions, medications and stress. It's important to identify the cause of erectile dysfunction and treat any underlying conditions.edicine. In some men, certain medicines can cause erectile dysfunction, including: 1  diuretics â these increase the production of urine and are often used to treat high blood pressure (hypertension), heart failure and kidney disease. 2  antihypertensives â such as beta-blockers, that are used to treat high blood pressure.