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Colorblindness is a recessive sex-linked disorder. A normal visioned woman, who is a carrier for colorblindness, is crossed with a colorblind man. Which statement is most accurate concerning their offspring?

Men always pass the color blind gene to their daughters but the daughters end up color blind only under the right circumstances.

Explanation:  For example, if your uncle married a woman who carried the color blind gene, then each of their sons and daughters would have a 50% chance of being color blind.

Explanation:

          XC            Xc

Xc      XCXc     XcXc

Y         XCY      XcY

50% of the male offspring will be colorblind, 50% of the male offspring will not be colorblind.

50% of the female offspring will be colorblind, 50% of the female offspring will not be colorblind.

the answer that best describes the relative refractory period in the neuron is the resting membrane potential is restored, but concentrations of sodium and potassium are not restored to their original state.

the refractory period is the time during which another stimulus given to the neuron will not lead to a second potential. thus, because na+ channels are inactivated during this time, additional depolarizing stimuli do not lead to new action potentials.  

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