People who have tay-sachs disease cannot metabolize some lipids effectively. tay-sachs is a recessive disorder. a student used a punnett square to determine the probability of offspring inheriting the disease. the results from a punnett square are 25% tt, 50% tt, and 25% tt. t represents the dominant allele for this condition and t represents the recessive allele. which conclusion can be made regarding the genotypes of the parents and the probability of inheriting a tay-sachs allele? a. the parents must be tt and tt which yields a 50% chance of inheriting an allele for the disease b. the parents must be tt and tt which yields a 25% chance of expressing the disease. c. the parents must be tt and tt which yields a 75% chance of inheriting an allele for the disease and 25% chance of expressing the disease. d. the parents must be tt and tt which yields a 25% chance of inheriting an allele for the disease.