Table 321 Proposed Number of Hox Genes in Various Extant and and Extinct

question 58

Multiple Choice

Table 32.1. Proposed Number of Hox Genes in Various Extant and Extinct Animals

-All things being equal, which of these is the most parsimonious explanation for the change in the number of Hox genes from the last common ancestor of insects and vertebrates to ancestral vertebrates, as shown in the table?

• A) The occurrence of seven independent duplications of individual Hox genes.
• B) The occurrence of two distinct duplications of the entire seven-gene cluster, followed by the loss of one cluster.
• C) The occurrence of a single duplication of the entire seven-gene cluster.

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Definitions:

Periodic Compounding

Periodic compounding involves the process of calculating interest on both the initial principal and the accumulated interest from previous periods on a deposit or loan.

Mortgage Loan

A loan secured by real estate. Commonly referred to simply as a mortgage.

Compounded Monthly

The process of adding interest earned back to the principal sum of a deposit or loan, with this process happening every month.

Interest

is the cost of borrowing money or the payment made by a bank or financial institution to an account holder for the use of their funds.