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The male child (XY) will receive the X chromosome from his mother and the Y from his father. Since color-blindness is X-linked, he will not receive the color-blindness trait from his father (since he only receives the Y from his father). The only way the child could possibly be color blind is...

Yes it does pose a hazard. Beyond general PPE (personal protective equipement such as gloves, lab coat, safety glasses), a laminar flow hood (ie: tissue culture hood) is used not only to protect the invidual performing the task from the cells, but to also protect the cells being cultured...