Final answer:
In paracentric inversion heterozygotes, inversion loops do form during meiosis to allow for proper gene alignment and recombination, contrary to the false assertion in the question.
Step-by-step explanation:
The statement that inversion loops do NOT form during meiosis in paracentric inversion heterozygotes is false. In cases of chromosomal inversions, specifically paracentric inversions, during meiosis, the affected homologous chromosomes do indeed form an inversion loop. This loop is necessary for the chromosomes to pair up correctly during synapsis, as one chromosome needs to form an inverted loop to retain gene alignment and allow for recombination. Without the formation of such a loop, homologous chromosomes would not be able to align properly, potentially leading to issues with gene recombination and subsequent genetic abnormalities in the resulting gametes.