Two Competing Hypotheses to Account for the Increase in the Number

question 3

Multiple Choice

Two competing hypotheses to account for the increase in the number of Hox genes from the last common ancestor of bilaterians to the last common ancestor of insects and vertebrates are (1) a single duplication of the entire four-gene cluster, followed by the loss of one gene, and (2) three independent duplications of individual Hox genes. To prefer the first hypothesis on the basis of parsimony requires the assumption that

• A)the duplication of a cluster of four Hox genes is equally as likely as the duplication of a single Hox gene.
• B)there is an actual process by which individual genes can be duplicated.
• C)genes can exist is spatial groupings called clusters.
• D)clusters of genes can undergo disruption, with individual genes moving to different chromosomes during evolution.

---

Definitions:

Organization's Memory

The cumulative body of knowledge, information, and data that an organization accumulates over time, which is accessible for decision-making and learning purposes.

Data Mart

A low-cost, scaled-down version of a data warehouse that is designed for the end-user needs in a strategic business unit (SBU) or a department.

Scaled-Down

Refers to a reduced or simplified version of something, especially designed to meet specific criteria or fit within certain limitations.

End-User Needs

The requirements and goals of the final user of a product or service, essential for designing effective solutions.