The Finding That Homeotic Genes Are Present in Both Mammals

question 42

Multiple Choice

The finding that homeotic genes are present in both mammals and insects indicates that these genes must

• A)control the same traits.
• B)be on the same chromosomes.
• C)have arisen very early in the evolutionary history of animals.
• D)have developed independently and simultaneously.

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Definitions:

Resonance

A concept in chemistry where a molecule is represented by two or more structures to depict its electron distribution more accurately.

Friedel-Crafts Alkylation

A chemical reaction process that introduces an alkyl group into an aromatic ring, typically using an alkyl halide and a strong Lewis acid catalyst.

Limitations

Refers to the restrictions or constraints that may hinder progress or achievement in a certain context or system.

M-Bromoethylbenzene

A brominated aromatic compound where a bromine atom is attached to the ethyl group which is then attached to the benzene ring at the meta position.