Question

what condition is necessary for a genetic change that occurs in one individual to be spread to other individuals?
○ a common phenotype
○ a common gene pool
○ a similar habitat
○ a similar niche

Explanation:

A common gene pool is necessary for a genetic change in one individual to spread. This is because a gene pool is the collection of all genes (genetic information) in a population. If individuals share a gene pool, genetic changes can be passed on through reproduction. A common phenotype (observable traits) doesn't directly enable genetic spread. A similar habitat or niche (role in the ecosystem) might influence survival but not directly the spread of a genetic change like a gene pool does.

Answer:

a common gene pool