It has always been said that sexual reproduction produces offsprings which are superior to their parents, due to the variations which they acquire causing them to survive better in their environment. That's because we can think of meiosis occurring at some level of their life cycle resulting in the variations in the final offspring.
 But what when we talk about bisexual organisms, might they be plants, animals or any other life form? Can't there be variations in their offsprings if they produce them asexually? It's like when they undergo gamete formation in different male and female structure present in that single parent, they'll surely undergo meiosis(if the parent is not haploid undoubtedly) forming the gametes which are dissimilar in their genetic makeup. When these fertilize, shouldn't they show variations?
A few examples:

Starch
A polymer of glucose that can form a double helix and functions primarily as energy storage in plants.

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f-Actin
Filamentous actin forms a helical structure with two strands of polymerized g-actin. This is a structural component of the cytoskeleton.

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Coiled Coil
Protein motif with a helical structure formed by two (or more) α-helices. Coiled coils are found in a diverse range of proteins from structural proteins like keratin to transcription factors like c-Fos.

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Gramicidin
A peptide-based antibiotic that has been shown to form membrane spanning double helices.

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