The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

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Chapter 23, Problem 9TYK

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Introduction:

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

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Adaptive radiation is common following a period of mass extinction, probably because (a) the survivors of a mass extinction are remarkably well adapted to their environment (b) the unchanging environment following a mass extinction drives the evolutionary process (c) many adaptive zones are empty(d) many ecological niches are filled (e) the environment induces changes in the timing of development for many species

When two organisms are very distantly related in an evolutionary sense, (a) they should have extremely similar embryonic development. (b) they must share a very recent common ancestor. (c) the sequences of DNA in their genes should be less similar (more different) than those of two more closely related organisms. (d) they should share more homologous traits than two more closely related organisms share.

The challenge in using sequence data to estimate the evolutionary tree for all living things is to find a gene that shows recognizable sequence similarities even between highly distantly related species . Which of the following should NOT be among the features of this gene? A. The gene subject to strong diversifying selection. B. It is present in all organisms. C. It encodes a product whose function is essential. D. The function of the gene must have remained the same in all organisms.

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Question

Chapter 23, Problem 9TYK

Summary Introduction

Introduction:

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

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Answer 3

Question

Chapter 23, Problem 9TYK

Summary Introduction

Introduction:

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

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Answer 4

Question

Chapter 23, Problem 9TYK

Summary Introduction

Introduction:

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

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Answer 5

Chapter 23, Problem 9TYK

Summary Introduction

Introduction:

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

Answer 6

Chapter 23, Problem 9TYK

Summary Introduction

Introduction:

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

Answer 7

Chapter 23, Problem 9TYK

Summary Introduction

Introduction:

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

Answer 8

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Answer 11

Ch. 23.1 - What biological materials are the most likely to...Ch. 23.1 - Prob. 2SB Ch. 23.1 - Prob. 3SB Ch. 23.2 - Prob. 1SB Ch. 23.2 - Prob. 2SB Ch. 23.3 - Which type of geographical distribution requires...Ch. 23.3 - Why do distantly related species that live in...Ch. 23.4 - What factors might allow a population of organisms...Ch. 23.4 - What events apparently triggered the mass...Ch. 23.4 - Prob. 3SB

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

Solution Summary: The author concludes that the homeobox genes code for transcription factors activating or repressing genes that influence an organism's form.

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Introduction:

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

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Chapter 23 Solutions

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

Solution Summary: The author concludes that the homeobox genes code for transcription factors activating or repressing genes that influence an organism's form.

Concept explainers

Videos

Introduction: The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.

Want to see the full answer?

Chapter 23 Solutions

Introduction:

The homeobox genes are also called ‘hox’ genes. They are of various types, like Hox and PraraHox genes. These genes are important for the segmentation of the body. The hox gene sequences are always conserved. There are some hox genes which are similar in Drosophila and Humans.