In Humans,normal Skin Pigmentation Is Influenced by a Dominant Gene

question 18

Multiple Choice

In humans,normal skin pigmentation is influenced by a dominant gene (C) ,which allows pigmentation to develop.All individuals who are homozygous for the recessive allele (c) are unable to produce an enzyme needed for melanin formation and are therefore referred to as albino.Two normal parents produce an albino child.What are the chances that the next child will be an albino?  

• A) 1/2 chance
• B) 2/3 chance
• C) 1/4 chance
• D) 1/8 chance
• E) no chance

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Definitions:

Epinephrine Levels

The concentration of epinephrine, also known as adrenaline, in the body which can increase in response to stress or fear, enhancing alertness and physical readiness.

Stress

The body's response to any demand or challenge, which can be triggered by both positive and negative experiences and can affect mental and physical health.

Stress Response

A physical and psychological reaction to a demand or threat, involving release of stress hormones and activation of the sympathetic nervous system.

Metabolism

The set of life-sustaining chemical transformations within the cells of living organisms, involving the conversion of energy from food into cellular components and waste products.