How many of the following genotypes are representing tall plants...

In pea plants, the allele for tallness (T$) is dominant over dwarfness (t$), and the allele for round seeds (R$) is dominant over wrinkled seeds (r$).

For a plant to be tall with round seeds, its genotype must contain at least one dominant allele for both traits, which means it must be of the form $T\_R\_.<br><br>Analyzing the given genotypes:<br>$TTrr$: Tall, wrinkled<br>$Ttrr$: Tall, wrinkled<br>$TtRr$: Tall, round<br>$TTRr$: Tall, round<br>$ttrr$: Dwarf, wrinkled<br>$TtRR$: Tall, round<br><br>There are three genotypes (TtRr$, $TTRr$, and $TtRR$) that represent tall plants with round seeds.

Answer: Three