Red-green color blindness is a sex-linked recessive condition caused by a gene located on the X chromosome.

• The allele for normal vision is represented by $X^B$.
• The allele for red-green color blindness is represented by $X^b$.

Complete the Punnett square to show the potential genotypes of the offspring from a male with red-green color blindness and a female who is a carrier of the color blindness allele.