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summerrenne
the allele for tall pea plants is dominant over the allele for short pea plants.what must be true for a cross between a tall plant and a short plant to produce any short plants?
It would be easier to help you with this question if you gave us some indication of where you're stuck or what about it you'd like help with. In this case, you should start by assigning a notation to the alleles - T for the dominant trait, tall, and t for the recessive case, short. Then you can use these to explore the results of possible crosses using Punnett Squares.