Question

if joseph has children with someone who doesnt carry the gene for color blindness, will their children be color blind? you can draw a punnett square on a piece of paper to help you answer the question or select view image to observe the diagram. scroll down to select the answer. a) no, none of them will be colorblind b) yes 50% of them will be colorblind c) yes 25% of them will be colorblind d) yes, all of them will be colorblind

Explanation:

Color - blindness is an X - linked recessive trait. If the partner doesn't carry the color - blindness gene, and assuming Joseph is male (as males are more commonly affected by X - linked recessive disorders), he passes his Y chromosome to sons (who will not be color - blind as the gene is on the X chromosome) and his X chromosome with the possible color - blindness gene to daughters. But since the mother has no color - blindness gene, daughters will be carriers at most and not color - blind. So, none of the children will be color - blind.

Answer:

a) No, none of them will be colorblind