No, the TT 30/ TT 33 is made by the Russians at around WW2
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Tt, tt -- novanet :)
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If the two parent pea plants have Tt traits, they will create
TT, Tt, Tt, tt. 1 TT - homozygous dominant, 2 Tt - heterozygous,
and 1 tt - homozygous recessive.