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Ploidy Manipulation of Zebrafish Embryos with Heat Shock 2 Treatment
Published on: December 16, 2016
LIZARD REPRODUCTION: REFRACTORY PERIOD AND RESPONSE TO WARMTH IN UTA STANSBURIANA FEMALES
Abstract:
Photoperiod does not affect timing of the female reproductive cycle in Uta stansburiana. This lizard is refractory to reproduction until early December. Later, prolonged warmth under laboratory conditions initiates the reproductive cycle in some lizards regardless of photoperiod.
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Background and Environment Affect Phenotype
Although the genetic makeup of an organism plays a major role in determining the phenotype, there are also several environmental factors, such as temperature, oxygen availability, presence of mutagens, that can alter an organism’s phenotype.
An example of how genetic background affects phenotype can be seen in horses. The Extension gene in horses is responsible for their coat color. A wild-type gene (EE) produces black pigment in the coat, while a mutant gene (ee) produces red pigment. A...
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