Question

which of the following would not represent a gamete from a heterozygous tall pea plant? (tall is dominant and short is recessive)
t
tt
t

Explanation:

A heterozygous tall pea plant has the genotype Tt (where T is dominant for tall, t is recessive for short). During gamete formation (meiosis), the alleles segregate, so gametes should have either T or t (not both together in a single gamete, as that would be a diploid - like state, not a haploid gamete). So Tt cannot be a gamete from a Tt plant.

Answer:

B. Tt