In the family pedigree the majority of individuals that are colorblind are which gender? This is a good indicator that colorblindness is what?

The 'gene' which causes (inherited, red and green types of) colour blindness is found only on the X chromosome. So, for a male to be colour blind the colour blindness 'gene' only has to appear on his X chromosome. For a female to be colour blind it must be present on both of her X chromosomes.

Explanation:

since there are no options posted i'll give you a few examples.

a dolphin's flipper, bird's wing, cat's leg.