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.
One with extra fingers will live longer.
The average lifespan of a housefly is about 2.5 weeks.
The lifespan of a rat is 2 to 3 years on average.
20 year5
LONG TIME
The average lifespan of a charolais cow is around 15 years.
25-- i wish longer!!!
10-14 years
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 Cockatoo lifespan is 40-60 years.
The average lifespan is three to four months.
3-5 years on average, but up to 10.