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Biological Psychology: Polygenic Inheritance

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Biological Psychology—Polygenic Inheritance
I found polygenic inheritance and its influence on behavior very interesting. There is a complex connection between humans’ genetic make-up and their behavior. Polygenic traits are those that are controlled by “interaction” of more than one gene (Feist et al., 2015). Many genes are involved in polygenic inheritance as opposed to monogenic inheritance, where traits are controlled by a single gene. Personality traits are polygenic and thus, a combination of many genes determines the personality of an individual. This shows that genes play a crucial role in influencing one’s personality and behavior although environmental factors are also important in shaping one’s behavior.
Biological Psychology—Hindbrain
The hindbrain is the “oldest brain region” (Feist et al., 2015). Hindbrain is located on bottom end of brain and thus, it is directly attached to the spinal cord. Hindbrain region include three important parts: the medulla, the pons, and cerebellum; these three structures play important roles in regulating breathing, heart rate, and other functions (Feist et al., 2015). Specifically, medulla is responsible for controlling breathing and heart rate. Reflexes such as swallowing, sneezing, and vomiting are …show more content…

Linear perspective is a common monocular depth cue which involves converging lines. One type of visual illusion is created based on depth cues that are interpreted by our brain (Feist et al., 2015). The Muller-Lyer illusion is resulted from the misperception of length of a line or distance. This illusion is associated with the “monocular depth cue of linear perspective” (Feist et al., 2015). In Muller-Lyer illusion, we perceive a linear shape longer than another similarly-sized shape. Therefore, this illusion influences our perception of two equally sized lines, tricking us in a way that one line appears to be longer than the

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