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characteristics such as eye color, height, weight, hair and skin color are examples of BLANK BLANK because several genes act togather to influence a trait

2007-01-09 18:04:05 · 4 answers · asked by aZn TeAsE 2 in Science & Mathematics Biology

4 answers

polygenic traits

2007-01-09 18:14:26 · answer #1 · answered by ecolink 7 · 0 0

multi-genetic traits


In medicine and (clinical) genetics preimplantation genetic diagnosis (PGD) is a considered as a very early form of prenatal diagnosis. Its main advantage is that it avoids selective pregnancy termination as the method ensures a pregnancy free of the disease under consideration. PGD thus is an adjunct to assisted reproductive technology, and requires in vitro fertilization (IVF) to obtain oocytes or embryos for evaluation.

In 1967, Robert Edwards and David Gardner reported the successful sexing of rabbit blastocysts, setting the first steps towards PGD (Edwards and Gardner, 1967). It was not until the 1980s that human IVF was fully developed, which coincided with the breakthrough of the highly sensitive polymerase chain reaction (PCR) technology. Handyside and collaborators' first successful attempts at testing were in October 1989 with the first births in 1990 (Handyside et al., 1992) though the preliminary experiments had been published some years earlier (Coutelle et al., 1989; Holding and Monk, 1989; Handyside et al., 1990). In these first cases, PCR was used for sex determination for patients carrying X-linked diseases.

2007-01-09 18:57:44 · answer #2 · answered by Anonymous · 0 0

Multigenic traits, or polygenic traits or compound heritability

2007-01-10 00:22:46 · answer #3 · answered by Gene Guy 5 · 0 0

polygenic effects - multiple genes contribute to one effect

2007-01-09 18:22:04 · answer #4 · answered by Anonymous · 0 0

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