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Time course imaging of two maize inbreds and their F1 hybrid (middle) exhibiting heterosis. Heterosis, hybrid vigor, or outbreeding enhancement is the improved or increased function of any biological quality in a hybrid offspring. An offspring is heterotic if its traits are enhanced as a result of mixing the genetic contributions of its parents
Inbreeding depression can also occur in a large population if individuals tend to mate with their relatives, instead of mating randomly. Due to higher prenatal and postnatal mortality rates, some individuals in the first generation of inbreeding will not live on to reproduce. [ 31 ]
The following is a list of genetic disorders and if known, type of mutation and for the chromosome involved. Although the parlance "disease-causing gene" is common, it is the occurrence of an abnormality in the parents that causes the impairment to develop within the child. There are over 6,000 known genetic disorders in humans.
Inbreeding depression in Delphinium nelsonii. A. Overall fitness of progeny cohorts and the B. progeny lifespan were all lower when progeny were the result of crosses with pollen taken close to a receptor plant. [1] Inbreeding depression is the reduced biological fitness that has the potential to result from inbreeding, the breeding of related ...
[1] [2] Patients observe these symptoms and seek medical advice from healthcare professionals. Because most people are not diagnostically trained or knowledgeable, they typically describe their symptoms in layman's terms, rather than using specific medical terminology. This list is not exhaustive.
Medications for Depression: An Overview. Antidepressants are a class of medications used very commonly to treat depression. In fact, nearly 13 percent of people 12 and over in the U.S. used ...
Also called functionalism. The Darwinian view that many or most physiological and behavioral traits of organisms are adaptations that have evolved for specific functions or for specific reasons (as opposed to being byproducts of the evolution of other traits, consequences of biological constraints, or the result of random variation). adaptive radiation The simultaneous or near-simultaneous ...
This list also includes updates featured in the text revision of the DSM-IV, the DSM-IV-TR, released in July 2000. [2] Similar to the DSM-III-R, the DSM-IV-TR was created to bridge the gap between the DSM-IV and the next major release, then named DSM-V (eventually titled DSM-5). [3] The DSM-IV-TR contains expanded descriptions of disorders.