Colorblindness Is an X Chromosome-Linked, Recessive Trait

question 5

True/False

Colorblindness is an X chromosome-linked, recessive trait. None of the children of a normal mother (X^CX^C) and a colorblind father (X^cY) could possibly be colorblind.

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Definitions:

Vasodilator Substance

Chemicals that relax and expand blood vessels, increasing blood flow and decreasing blood pressure.

Epinephrine

Hormone (amino acid derivative) similar in structure to the neurotransmitter norepinephrine; major hormone released from the adrenal medulla; increases cardiac output and blood glucose levels; also called adrenaline.

Coronary Blood Vessels

Arteries and veins that provide blood supply to the heart muscle.

Venous Blood

Blood that is returning to the heart through veins after having circulated through the body, characterized by its dark red color due to lower oxygen content.