Assumptions:
* Simple Dominance: We're assuming that tallness is dominant over shortness. This means that a plant with at least one "tall" allele will be tall.
* Single Gene: We're assuming that height is controlled by a single gene with two alleles: "T" (tall) and "t" (short).
The Cross:
* Homozygous Tall Plant: TT (two "tall" alleles)
* Short Plant: tt (two "short" alleles)
Punnett Square:
To visualize the possible offspring, we use a Punnett square:
```
T T
t Tt Tt
t Tt Tt
```
Results:
All possible offspring will be Tt (heterozygous). Since "T" is dominant, all of these offspring will be tall.
Conclusion:
If you cross a homozygous tall plant (TT) with a short plant (tt), all of the offspring will be tall, but they will be heterozygous (Tt).
