There are two types of inversion at the chromosome level, depending on the centromere:
Paracentric inversions:
the centromere is not included in the inversion.
Pericentric inversions:
The centromere is included in the inversion which can transform a metacentric chromosome into an acrocentric chromosome.
the structure that will form during synapsis is inversion loop.
These inversions are balanced rearrangements but at the moment of meiosis they cause difficulties in pairing. There is most often formation of a pairing loop. The occurrence of recombination in the inverted segment causes the formation of abnormal gametes by duplication / impairment.
Answer: Galapagos tortoises are actually not of the same species most of them are sub-species of a larger older cousin though they are all classified as the species Galapagos tortoises but are not the same a lot of the sub-species have adapted to be able to live on specified island because not every island in the Galapagos is the same.
Weinberg equilibrium assumption is that the allele frequency remains the same from generation to generation.
thus, since the percentage of homozygous is 81 and that of heterozygous is 19%. going by the Weinberg assumption, it will remain the same in the next generation.