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?*

Based on the observation that only male crickets produce a song, you hypothesize that a male's song is a form of communication to potential mates. you set up a simple experiment to test this hypothesis. in the laboratory, you place a male snowy tree cricket in enclosure a, which is adjacent to enclosureb. in enclosure b, you place other insects, one at a time, and observe their responses to the male's song. the enclosures are designed so that the two insects being tested cannot see or smell each other, but sound is transmitted from enclosure a to enclosureb.