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Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
ISBN: 9781305251052

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BuyFindarrow_forward

Human Heredity: Principles and Iss...

11th Edition
Michael Cummings
ISBN: 9781305251052
Textbook Problem

Genomics and Human Evolution

The Denisovan genome contains sequences that originated from an unknown human species. Using Figure 19.11, speculate on which species this might be. Is it possible that there are other ancestral species that may remain to be discovered that would change the phylogeny presented in the figure?

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FIGURE 19.11 Estimates for the dates of origin and extinction for the three main groups of hominins (green, blue, and orange). The australopithecines split into two groups about 2.7 million years ago. One of those groups, the genus Homo, contains the ancestors to our species, H. sapiens.

Summary Introduction

To determine: The species from which the Denisovans genome originated, using Figure 19.11 of the book as reference.

Introduction: The term of genome was established in the year 1930. The genome refers to the genetic material that comprises of the genes and non coding DNA. Genomics is the study of genome of organisms.

Explanation

From the given figure19.11, it can be observed that the Denisovans are diverged from the common ancestors of both Humans and Neanderthals. On the basis of the figure the common ancestor is Homo heidelbergensis...

Summary Introduction

To explain: Whether there is a possibility that an undiscovered ancestral species may change the phylogeny given in the Figure 19.11 of the book.

Introduction: Phylogeny establishes a link between the evolved species and their ancestors. The study of phylogeny is termed as phylogenetics. Phylogenetics helps in evaluation of the inherited traits in various organisms.

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