Biology
5th Edition
ISBN: 9781260487947
Author: BROOKER
Publisher: MCG
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Chapter 26.3, Problem 1CS
Core Skill: Modeling The goal of this modeling challenge is to revise the model shown in Figure 26.22 to account for recent data indicating that some modern Africans have a small amount of Neanderthal DNA.
Modeling Challenge: As discussed in this section, between 1% and 4% of the DNA of modern humans of European descent is derived from that of Neanderthals. Though most modern humans of African descent do not carry Neanderthal DNA, recent evidence has shown that some of them carry a very small amount. Assuming that the presence of this Neanderthal DNA is not due to recent interbreeding between modern humans of European and African descent, revise the model shown in Figure 26.22 to account for the observation.
Figure 26.22 A simplified model for the origin and spread of Homo sapiens throughout the world. This map, based on differences of mtDNA throughout current members of the world’s population, suggests Homo sapiens originated in East Africa. About 100,000 years ago, the species spread into the Middle East and from there to Europe, Asia, Australia, and the Americas.
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Exercise 3. Create a phylogeny to try to understand the evolutionary history of mammals related to the
giant panda using the gene Leptin.
Introduction: Did you know that it is required that every gene that is sequenced and published must be
made fully accessible on the internet. What that means is you can look up any gene online. Today we will
use the NCBI website: The National Center for Biotechnology Information to first find a gene in giant
Pandas and then we will use a feature on the NCBI website called BLAST which measures the degree of
gene sequence similarity between various types of organisms. Once we have identified these gene
sequences we will use them to build a phylogeny to figure out which animals are most closely related to
giant Pandas. 1. First make a guess and label this phylogenetic tree to include: Giant Pandas, Bears, Sea
Lions and Cats. Showing which are most closely related to one another:
1
2-Now do a search on the gene Leptin. What is its function? Regulation of…
Using the skills you learnt in the DNA Analysis tutorial, correctly identify the gene and species of the following DNA sequence:
TATGCCCTGGTTATCTTCGAGATGGTCCACCTGAAGGAGCTGGGGCTTTATAACCTCATG
Gene: Insulin Receptor (INSR), Species: Mus Musculus
Gene: Insulin Receptor (INS), Species: Homo Sapiens
Gene: Epidermal Growth Factor Receptor (EGFR), Species: Homo Sapiens
Gene: Epidermal Growth Factor Receptor (EGFR), Species: Mus Musculus
What is DNA fingerprinting? what is its application/s (legally and medically) and limitation/s?
How does this technology work? i.e in genomic DNA identification? What is its molecular basis?
How does molecular biology paved way for the emergence of this technology?
Chapter 26 Solutions
Biology
Ch. 26.1 - Prob. 1CCCh. 26.1 - Prob. 2CCCh. 26.2 - Prob. 1CSCh. 26.2 - Prob. 1CCCh. 26.2 - Prob. 2CSCh. 26.3 - What are the defining features of primates?Ch. 26.3 - Core Skill: Modeling The goal of this modeling...Ch. 26 - Prob. 1TYCh. 26 - Prob. 2TYCh. 26 - Prob. 3TY
Ch. 26 - The endosymbiosis hypothesis explaining the...Ch. 26 - Prob. 5TYCh. 26 - Which of the following explanations of...Ch. 26 - Prob. 7TYCh. 26 - Prob. 8TYCh. 26 - Prob. 9TYCh. 26 - Which of the following statements regarding modern...Ch. 26 - Prob. 1CQCh. 26 - Prob. 2CQCh. 26 - Core Concept: Evolution Describe two examples in...Ch. 26 - Discuss the factors that have contributed to the...Ch. 26 - Discuss how the human body has changed since the...
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- Using the skills you learnt in the DNA Analysis tutorial, correctly identify the gene and the species of the following DNA sequence: AACCAGTGTGCTGCAGGCTGCACAGGCCCCCGGGAGAGCGACTGCCTGGTCTGCCGCAAA Using the skills you learnt in the DNA Analysis tutorial, correctly identify the gene and the species of the following DNA sequence: AACCAGTGTGCTGCAGGCTGCACAGGCCCCCGGGAGAGCGACTGCCTGGTCTGCCGCAAA Gene: RNA Polymerase I. Species: Homo Sapiens Gene: Epidermal Growth Factor Receptor (EGFR). Species: Homo Sapiens Gene: DNA Polymerase II. Species: Mus Musculus Gene: Insulin Receptor (INSR). Species: Homo Sapiensarrow_forwardGenome duplication in the animal lineage leading to chordates has produced the largest genome sizes in which of the following vertebrate groups? the cephalochordates (like the lancelet) the chondrichthyes (like the shark) the agnathan fishes (like the hagfish) the teleost fishes (like the trout) the urochordates (like the sea squirt)arrow_forwardEssay: Answer the following questions in paragraph form. Create atlest 3-5 sentences each to support your answer. Base on your own opinion, what does genetics mean? What is its relationship to all living things? What is the connection of Genetics and DNA with each other? Are they related or not? Give your own opinion and you can also cite an example if needed. What is DNA, rDNA and mtDNA? Explain each function. What are the advantages and disadvantages of genetic engineering? If you were given the chance to genetically modify an organism, what would it be and what would you like to modify from that organism?arrow_forward
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- Objective: Get a sense of how genomics, the study of the genome in its entirety,needs to think about how to go about its research. Geonomic DNA is broken up into fragments. The 5’ and 3’ ends of each fragment(a “read”) are sequenced. The sequenced reads are assembled together intocontiguous sequences (“contigs”) based on sequence similarity. The idea is to sequence enough random fragments so that every nucleotide in thegenome is represented on some read. The number of such fragments needed iscalled the coverage, c. The coverage c can be calculated by the formula RL/G, where R is the number ofreads sequenced, L is the average length of a read and G is the total length of thegenome. The units of length are bases (b) or base pairs (bp). Consider a genome whose length is 1000 bp. “Shotgun” sequencing techniquesare applied to the genome, resulting in 20 reads, with an average length of 50 bp.A very important point is that, even though 20 x 50 = 1000, there is no guaranteethat ALL…arrow_forwardObjective: Get a sense of how genomics, the study of the genome in its entirety,needs to think about how to go about its research. Geonomic DNA is broken up into fragments. The 5’ and 3’ ends of each fragment(a “read”) are sequenced. The sequenced reads are assembled together intocontiguous sequences (“contigs”) based on sequence similarity. The idea is to sequence enough random fragments so that every nucleotide in thegenome is represented on some read. The number of such fragments needed iscalled the coverage, c. The coverage c can be calculated by the formula RL/G, where R is the number ofreads sequenced, L is the average length of a read and G is the total length of thegenome. The units of length are bases (b) or base pairs (bp). Consider a genome whose length is 1000 bp. “Shotgun” sequencing techniquesare applied to the genome, resulting in 20 reads, with an average length of 50 bp.A very important point is that, even though 20 x 50 = 1000, there is no guaranteethat ALL…arrow_forwardProvide five advantages of Next Generation Sequencing? and explain each of these advantages.arrow_forward
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