Thirty people are selected for a long-term mission to colonize a planet many light-years away from Earth. The mission is successful, and the population rapidly grows to several hundred individuals. However, certain genetic diseases are unusually common in this group, and the group's gene pool is quite different from that of the Earth population they have left behind. Which of the following phenomena has left its mark on this population

Founder effect

Explanation:

Founder effect was first outline by Ernst Mayr in 1942 using existing theoretical works, founder effect is a special case of a random genetic drift in the population gene which leads to loss of genetic variation that occurs when a new population ( that consist of few individual) becomes isolated from main pool, this new few individuals may establish a new population whose gene is different from the original population both in terms of its phenotype and phenotype

example is the Afrikaner population of Dutch settlers in South Africa

answer; i believe the correct answer is ; large pieces of pangaea drifted in different directions over millions of years;

because there are alot of mountains