In the following problem, capital letters will be used to denote a dominant trait, and lower-case letters will be used for the recessive trait.
In peas, the stem length may result in a tall (T) or dwarf (t) plant. What proportion of the offspring in the following crosses would be expected to be tall, and what proportion dwarf?
1. TT x tt
2. TT x Tt
3. tt x Tt
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