Why is it that a genotype of an organism can always tell you the phenotype but a phenotype can only sometimes tell you its genotype?

Sorry for the long answer...  Suppose that T is a gene that produces tall tomato plants and t is a gene that produces short tomato plants.  So if we know the genotype (TT, Tt, or tt), we can determine the phenotype

Explanation:

TT and Tt are both tall tomato plants, but tt is a short tomato plant.  Jus because it's tall, we don't know if it's TT or Tt.

hey, i believe your answer would be d. sugar ribose and the base uracil. i believe this is the answer, because rna consists of sugar ribose, adenine, guanine, cytosine, and uracil.

your first option is incorrect, because that's dna. where it consists of sugar deoxyribose, adenine, guanine, cytosine and thymine.

your second option is also incorrect, this is because sugar deoxyribose is in dna, and uracil is in rna. these two do not make sense together.

your third option being incorrect, because sugar ribose is in rna, but not the base of thymine. rna consists of uracil, not thymine.

lastly your fourth option being correct! this answer is correct, because both sugar ribose, and the base uracil are in rna! ~

answer is d. sugar ribose and the base uracil.

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