In pea plants, smooth seed texture is dominante over wrinkled seed texture.?

In pea plants, smooth seed texture is dominante over wrinkled seed texture. A gardener has a pea plant that produces smooth seeds. How can the gardener determine whether the plant is homozygous or heterozygous of the allele that determines seed texture?In pea plants, smooth seed texture is dominante over wrinkled seed texture.?
cross it to itself. If it is homozygous, none of the resulting seeds will be wrinkled.In pea plants, smooth seed texture is dominante over wrinkled seed texture.?
By self pollinating the plant. If a homozygous recessive trait is among the offspring, the parent was heterzygous.
Cross the plant with another smooth producer this smooth producer should be a known homozygous. Over several tries (cross breeding) if the pea plant only produces smooth it is Homozygous, if not it is heterozygous
Allow the plant to pollinate itself, or fertilize the plant with its own gametes manually. If any wrinkled offspring appear than it is clearly heterozygous.