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Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892

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BuyFindarrow_forward

Biology: The Dynamic Science (Mind...

4th Edition
Peter J. Russell + 2 others
ISBN: 9781305389892
Textbook Problem

Arnold’s experiments on the feeding preferences of garter snakes demonstrated that food choice is largely governed by a snake’s:

a. early experiences.

b. genetics.

c. size and color.

d. diet while it was developing inside its mother.

e. trial-and-error learning.

Summary Introduction

Introduction:

Instinctive behavior can be performed without prior experience or exposure to the stimuli. The behavioural differences within species can be genetically controlled.

Explanation

Justification/explanation for the correct answer:

Option (b) states that genetics governs the food preferences according to the experiments done by Arnold. The feeding preference is an instinctive behavior, which was confirmed by Arnold by the experiments carried out on the hybrids of the coastal and inland garter snakes. The 85% of the newborn coastal snakes swallowed slugs whereas only 17% of the inland newborn snakes did the same. The 29% of the newborn hybrids from inland and coastal parents swallowed slugs confirming that the food choices are related to the parental genes. Hence, option (b) is correct.

Explanation for the incorrect answer:

Option (a) sates that Arnold’s experiments illustrated that feeding preferences are governed by the early experiences. Arnold found that there is involvement of the gene and the change of a gene or a locus affects the production of enzymes...

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