Two people (both heterozygotes) are able to taste a chemical substance called PTC. The ability to taste PTC is caused by a dominant allele (D). The inability to taste PTC is caused by a recessive allele (r). What proportion of their children would be expected to not have the ability to taste PTC? (You may want to draw a punnett square on a scrap piece of paper).   Group of answer choices 25% 50% 75% 100% 0%

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