I’m not sure I quite understand your question. I’d love to help you if only you could just elaborate
If you need to make up a sentence so that it should have a parallel structure it means that the second part of the sentence must have the same pattern of words. It is needed to emphasize that both parts of the sentence have the same importance.
Alice worked hard to ensure that her presentation was <span>creativel, effective and persuasive. (the same structure - adjectives)</span>
The teachers like John because he never came late to the classes, always got his homework in time and was very polite to teachers. (the same form of representing qualities).
Sorry haven't read the book it could of been a<em><u> tornado, hurricane, storm or blizzard</u></em>.
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It was the liver that was associated with love in the Shakespearean times.
One way to fix that sentence is to switch around the two phrases used; 'My mother and father are both scientists' and 'It must have been my destiny to become interested in biology.'
It must have been my destiny to spark an interest in Biology, as my mother and father are both scientists.
That's a way to fix that sentence used in your question.
Also, 'destiny' was spelled incorrectly.
This sentence may seem run on if you don't place a conjunction between the two phrases, or if the phrases are not switched.
If the sentence is to be used with a conjunction, it may end up like this....
My mother and father are both scientists, so it must have been my destiny to become interested in biology.
Or, you may just use a period, to change the two phrases used into two separate sentences.
Like this;
My mother and father are both scientists. For that reason, it must have been my destiny to become interested in biology.
ALSO, as you can see above, I have added a few words to the last sentence. Those three words, 'For that reason', give closure to the two sentences.
Hope this helped!
