Answer:
The possible gametes by a plant heterozygous for height (Tt) and red flowers (Rr) are TR, Tr, tR and tr.
Step-by-step explanation:
According to the law of genetics, when heterozygous traits are crossed, the gametes would be one homozygous dominant gamete, two heterogygous gametes and one homozygous recessive. Hence, the possible gametes produced by a plant heterozygous for height (Tt) and red flowers (Rr) are TR, Tr, tR and tr. While, TR is the homozygous dominant gamete, Tr, tR are the heterogygous gametes and tr is the homozygous recessive gamete.