In the case of colorblindness, the incidence rate is about 1 in 10 men (x chromosome gene so it affects far more men than women), so it’s reasonably likely you

In the case of colorblindness, the incidence rate is about 1 in 10 men (x chromosome gene so it affects far more men than women), so it’s reasonably likely you could find a tester among your peers if you ask around.