Some words that start with the letters tr:tracetracktradetrailtraintramptraptrashtraveltraytreadmilltreattreetrendtriadtrialtribetricktricycletriptripodtrolleytrooptrophytrouserstrucetrucktruetrulytrumptrusttruth
Trout
This is explained by Mendel's Law of Independent Assortment, which states that alleles for different traits segregate independently of one another during gamete formation. In this case, the alleles for height (Tt) and flower color (Rr) assort independently, leading to the formation of gametes with all possible combinations of these alleles: TR, Tr, tR, and tr.
IrisImpatiensIpomoeaIxia
If you mean "U", there are 0 flowers that start with "U".
orchid
Runuculus
Aspidistra.
rose
violet
Tagetes.
Some flowers that start with the letter "P" include peonies, pansies, poppies, and petunias.