Final answer:
The offspring of a Tt cross with Tt will show the same phenotype as the TT parent, meaning the offspring will display the dominant trait, which is tall in this context and the correct answer option is c. all display the same phenotype as the TT parent.
Step-by-step explanation:
If T is dominant to t, the offspring of the cross of Tt with Tt will all display the same phenotype as the TT parent. Let us consider the possible genotypes for this cross. The genotypes that could result from a Tt cross with another Tt individual are TT, Tt, tT, and tt. According to Mendelian genetics, this results in a genotype ratio of 1 TT: 2 Tt: 1 tt and a phenotype ratio of 3:1, where three of the four offspring will display the dominant trait (tall), and one will display the recessive trait (short), given that T is for tall and t is for short.
Therefore, the correct answer to this question is c. all display the same phenotype as the TT parent, meaning the resulting offspring would show the dominant trait. However, not all will be homozygous or have the same genotype as the TT parent, and some will display the recessive phenotype if homozygous recessive (tt).