If they only have polydactyly and no other defect, then as long as any other person. However, if it is linked to another genetic defect, then the life expectancy would be as long as any other person with that defect.
The lifespan of a rat is 2 to 3 years on average.
The average lifespan of ants ranges from a few weeks to several years, depending on the species.
LONG TIME
20 year5
The average lifespan of a charolais cow is around 15 years.
10-14 years
25-- i wish longer!!!
A chimpanzee's average lifespan is 50 years.
The average lifespan of a sturgeon is 100 years old, making it the fish with the longest lifespan.
The average lifespan of a housefly is about 2.5 weeks.
3-5 years on average, but up to 10.
The average lifespan is three to four months.