Are Mutations Assumed to Be Independent and Identically Distributed Across Species?

Are Mutations Assumed to Be Independent and Identically Distributed Across Species?

The correct answer is assumed.

The complete sentence should read: 'Mutations are assumed to be independent and identically distributed across species.'

Here's why:

• 'Assume' is a verb, while 'assuming' is a participle. This sentence requires the past participle form, 'assumed,' to show that the assumption has already been made.

This assumption of mutations being independent and identically distributed (IID) is a common simplification in evolutionary biology. It means that:

• Independent: Each mutation event is assumed to occur independently of other mutations. This means that one mutation doesn't affect the likelihood of another mutation happening.
• Identically Distributed: The probability of a particular type of mutation occurring is the same across the genome and across different individuals within a species.

While this IID assumption is useful for modeling purposes, it's important to remember that it's a simplification. In reality, mutation rates can vary across the genome and can be influenced by various factors.