in a genetics laboratory two heterozygous tall plants (Tt) are crossed. complete the punnett square below

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Sure! Here is the Punnett square for crossing two heterozygous tall plants (Tt):

T t
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T | TT Tt
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t | Tt tt

In this Punnett square, the uppercase letter "T" represents the dominant allele for height (tall), and the lowercase letter "t" represents the recessive allele for height (short). By crossing two heterozygous tall plants (Tt), we can see that there is a 25% chance of getting a homozygous dominant tall plant (TT), a 50% chance of getting a heterozygous tall plant (Tt), and a 25% chance of getting a homozygous recessive short plant (tt).