About 70% of Americans get a bitter taste from the substance called phenylthiocarbamide (PTC). It is tasteless to the rest. The "taster" allele is
dominant to non-taster. Also, normal skin pigmentation is dominant to albino. A
normally pigmented woman who is tasteless for PTC has an albino-taster father.
She marries an albino man who is a taster, though the man's mother is tasteless
to PTC. What FRACTION of their offspring will be albino and tasteless to PTC?*