Respuesta :
"Alleles in the F1 must be Tt to have height variety in the F2" is the reason among the following choices given in the question why it was impossible to observe segregation. The correct option among all the options that are given in the question is the fourth option or option "D". I hope the answer helped you.
i believe its D) Alleles in the F1 must be Tt to have height variety in the F2.