Chapter 19, Problem 2Q

Summary Introduction

To review:

An experimental approach for testing the hypothesis generated in question 1 and its results.

Given:

Figure 1 shows the gene expression pattern for both species 1 and 2 over the course of time.

Introduction:

Transcription factors are the proteins involved in the process of transcribing the DNA (deoxyribonucleic acid) molecules into RNA (ribonucleic acid). These factors can repress or activate transcription to regulate expression of a gene within a cell of an organism. Based on the observations from Figure 1, a hypothesis was generated in question 1 and it was stated that the differential timing of expression of transcription factor causes the morphological difference between species 1 and 2. A longer period of high transcription factor’s expression, in species 1 specifically leads to longer abdominal bristles in that species.