Genetics: A Conceptual Approach 6E w/ SaplingPlus (Six-Month Access)
Genetics: A Conceptual Approach 6E w/ SaplingPlus (Six-Month Access)
6th Edition
ISBN: 9781319125929
Author: Benjamin A. Pierce
Publisher: W. H. Freeman
Question
Book Icon
Chapter 4, Problem 14AQP
Summary Introduction

To determine:

Whether the unusual cold weather during breeding season of bearded lizard has any effect on the sex ratio.

Introduction:

The sex chromosome in males is generally XY and in females it is XX but in case of bearded lizard the male sex chromosomes are homozygous ZZ and in females, the sex chromosomes are heterozygous having ZW chromosome

Expert Solution
Check Mark

Explanation of Solution

The sex in bearded lizards is dependent on both the environment and genetics. Sex in the newborn bearded lizard was highly affected by the atmospheric temperature. When the temperature of the surrounding is less than 32°C, it promotes hatching of eggs and having a male lizard. The decrease in temperature did not have an effect on sex ratio though it only promoted hatching eggs having male dragon lizard.

Summary Introduction

To determine:

The effect of unusual warm temperature on the sex ratio of dragon lizard.

Introduction:

In bearded lizard, the male sex chromosome is ZZ and in females, it is heterozygous having ZW chromosome. The sex in newborn bearded lizard is highly affected by the atmospheric temperature

Expert Solution
Check Mark

Explanation of Solution

The sex ratio in bearded lizard is highly affected by increasing temperature. The lower temperature below 32°C, only promoted hatching the eggs containing male bearded lizards. This did not change the male and female ratio. But increase in temperature above 36°C results in the conversion of sex from males to females and increases the sex ratio in favor of female bearded lizards.

Conclusion

In bearded lizard, the male sex chromosomes are homozygous ZZ and in females, the sex chromosomes are heterozygous having ZW chromosome. The lower temperature below 32°C only promoted hatching the eggs containing male bearded lizards, and temperature above 36°C results in the conversion of the sex of eggs which did not hatch, from males to females and increases the sex ratio in favor of female bearded lizards.

Want to see more full solutions like this?

Subscribe now to access step-by-step solutions to millions of textbook problems written by subject matter experts!
Students have asked these similar questions
If you transplant trunk neural crest into the cranial neural crest region of a developing embryo, will you see the donor tissue form cartilage? Does the neural crest only give rise to two cells in the developing embryo, and is essential for lamprey to develop their jaw structure? Does a multipotent neural crest cell that is receiving Wnt signals become a Chromaffin cell?
Using quail and chick embryos, quail-specific antibody and fluorescent tissue-specific antibodies, design an experiment where you investigate the tissues the cranial neural crest can give rise to.  What are four derivatives of the cranial neural crest that you expect to see in the resulting chimeric embryos?
Does the neural crest have to undergo epithelial to mesenchymal transition prior to migration through the developing embryo?  Does the neural crest differentiate into different cell types based on their axial position along the anterior and posterior axis?
Knowledge Booster
Background pattern image
Similar questions
SEE MORE QUESTIONS
Recommended textbooks for you
Text book image
Human Anatomy & Physiology (11th Edition)
Biology
ISBN:9780134580999
Author:Elaine N. Marieb, Katja N. Hoehn
Publisher:PEARSON
Text book image
Biology 2e
Biology
ISBN:9781947172517
Author:Matthew Douglas, Jung Choi, Mary Ann Clark
Publisher:OpenStax
Text book image
Anatomy & Physiology
Biology
ISBN:9781259398629
Author:McKinley, Michael P., O'loughlin, Valerie Dean, Bidle, Theresa Stouter
Publisher:Mcgraw Hill Education,
Text book image
Molecular Biology of the Cell (Sixth Edition)
Biology
ISBN:9780815344322
Author:Bruce Alberts, Alexander D. Johnson, Julian Lewis, David Morgan, Martin Raff, Keith Roberts, Peter Walter
Publisher:W. W. Norton & Company
Text book image
Laboratory Manual For Human Anatomy & Physiology
Biology
ISBN:9781260159363
Author:Martin, Terry R., Prentice-craver, Cynthia
Publisher:McGraw-Hill Publishing Co.
Text book image
Inquiry Into Life (16th Edition)
Biology
ISBN:9781260231700
Author:Sylvia S. Mader, Michael Windelspecht
Publisher:McGraw Hill Education