Question

a recessive gene located on the x chromosome is the cause of color blindness in affected individuals. males are more likely to be colorblind than females because (1 point)
males have two copies of the x chromosome.
color blindness is associated with high testosterone levels.
males have only one copy of the x chromosome.
females have no copies of the x chromosome.

Explanation:

• Males have the sex - chromosome combination XY. Since the color - blindness gene is on the X chromosome and it is recessive, if a male inherits the recessive color - blindness gene on his single X chromosome, he will be colorblind.
• Females have the sex - chromosome combination XX. For a female to be colorblind, she needs to inherit the recessive color - blindness gene on both of her X chromosomes.
• Males having two copies of the X chromosome is incorrect (they have XY). Color - blindness is not associated with high testosterone levels. Females have two copies of the X chromosome (not no copies).

Answer:

males have only one copy of the X chromosome.