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1. A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is (1 point) 25%. 50%. 75%. 100%.

Biology
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75%
Punnett Squares help with this. The heterozygous plant has two different alleles - one for tallness, the other for shortness. You are told that it is tall so you know that one tall allele is sufficient to confer tallness - that lets you sort out the dominance relationship. Tall is dominant to short. The short plant, therefore, is homozygous recessive. Your genotypes are Tt and tt. Doing a Punnett Square will give you the genotypes - which you can interpret as phenotypes - of the offspring. Hope that's helpful.
1. A heterozygous tall pea plant is crossed with a short plant. The probability that an F1 plant will be tall is (1 point) (0 pts) 25%. (1 pt) 50%. (0 pts) 75%. (0 pts) 100%. 1 /1 point

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