Chapter 11, Problem 37A

Summary Introduction

To identify:

The temperature at which the wing length is greatest

Introduction:

The environment also has an effect on phenotype of an individual. The tendency to develop heart disease can be inherited but environmental factors like diet and exercise also contribute to the occurrence of disease. Sunlight, water and temperature are some environmental factors that affect an organism’s phenotype.

Answer to Problem 37A

The wing length of all flies is proportional to temperature.

Explanation of Solution

From the given graph we can see that the wing length of fly increases with increase in temperature. It is greatest at 31⁰C for both male and female flies. This is true for all flies. Wing length is proportional to temperature. This means, wing length increases with increase in temperature up to a certain limit.