Answer:
The answer is TRUE.
Step-by-step explanation:
The “Founder effect” phenomenon is a special case of genetic drift, where a new population originates from a few founder individuals, coming from a bigger population. This small population might or might not be genetically representative of the original one. Some rare alleles might be in exceed or might be completely lost. Consequently, when the small population increases in size, it will have a genetically different composition from the original one. In these situations, genetic variability is reduced and there exists the possibility of developing a peculiar allelic composition. This is the case of the Ellis syndrome characteristic of the Amish people from Pennsylvania, where there is a recessive allele frequency without precedent which, in homozygosis state, causes dwarfism and polydactyly. About 13% of the group members are carriers of the rare allele. The complete colony, isolated from the rest of the world, originates from a few individuals, and by chance, one of the originators was the first allele carrier.