Question

If a plant has the phenotype of the dominant trait of having thorns, then the plant has either the genotype Tt or tt.

Answer 1

If a plant has the phenotype of the dominant trait of having thorns then it will have TT because T is the dominant when the t is the recessive. so the answer to this is false. The genotype should be TT.

Answer 2

In a certain breed of plants, thorns are determined by the dominant gene T and thornless is determined by the recessive gene t.

So the statement is false as it cannot has genotype tt.