A stock fund that allows an investor to exchange his or her large holding of a single stock for units in a portfolio.Exchange funds provides investors with a easy way to diversify their holdings, while deferring any taxes from capital gains.Also known as a swap fund. stock fund that allows an investor to exchange his or her large holding of a single stock for units in a portfolio.
1. heterograft-tissue from an animal of one species used as a temporary graft (as in cases of severe burns) on an individual of another species. xenograft. graft, transplant - (surgery) tissue or organ transplanted from a donor to a recipient; in some cases the patient can be both donor and recipient.
Heterosis. (hybrid vigor), accelerated growth and increased dimensions, endurance, and fertility of various first-generation animal and plant hybrids. Heterosis is usually attenuated in the second and later generations.True heterosis, which is the ability of hybrids to leave a large number of fertile descendants, is distinguished from gigantism, which is the enlargement of the entire hybrid organism or of its individual parts.he application of heterosis has been one of the most important contributions of genetics to scientific agriculture in providing hybrid corn, and vigorous, high-yielding hybrids in other plants and in livestock. See Breeding (animal) , Breeding (plant) See Genetics, Mendelism.