if a true breeding strain of sweet pea is allowed to self-fertilize which of the following statements is true?

If a true‑breeding strain of sweet pea is allowed to self‑fertilize, it will continue to produce offspring with the same phenotype as the parent in every generation.

Key idea in simple terms

A true‑breeding plant means it is homozygous for the trait(s) being considered, so all its gametes carry the same allele(s).

When such a plant self‑fertilizes (self‑pollinates), every fertilization event just recombines the same alleles, so all offspring show the same form of the trait as the parent.

So, for a multiple‑choice style question:

Correct statement:
When they self‑fertilize, true‑breeding sweet pea plants always produce offspring that resemble the parent form of the trait (i.e., all offspring show the same phenotype as the parent).

Mini example (Mendel-style)

• Suppose a true‑breeding sweet pea with purple flowers has genotype PPPPPP.

• It produces only PPP gametes; self‑fertilization always gives PPPPPP offspring.
• Therefore, all progeny have purple flowers, generation after generation, as long as no new mutations or crosses occur.

TL;DR:
A true‑breeding sweet pea, if allowed to self‑fertilize, will always produce offspring with the same trait form as itself; the offspring’s phenotype matches the parent.

Information gathered from public forums or data available on the internet and portrayed here.