a) Which characters might fall at location 1? b) Is there another way to map one of these traits on this tree? c) Which characters would fall at location 3? d) Can you come up with some traits that would fall at location 5 that are not included in the table?
a) Which characters might fall at location 1? b) Is there another way to map one of these traits on this tree? c) Which characters would fall at location 3? d) Can you come up with some traits that would fall at location 5 that are not included in the table?
Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter13: Diversity Of Microbes, Fungi, And Protists
Section: Chapter Questions
Problem 1ACQ: Figure 13.6 Which of the following statements is true? a. Gram-positive bacteria have a single cell...
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Concept explainers
Genetic Variation
Genetic variation refers to the variation in the genome sequences between individual organisms of a species. Individual differences or population differences can both be referred to as genetic variations. It is primarily caused by mutation, but other factors such as genetic drift and sexual reproduction also play a major role.
Quantitative Genetics
Quantitative genetics is the part of genetics that deals with the continuous trait, where the expression of various genes influences the phenotypes. Thus genes are expressed together to produce a trait with continuous variability. This is unlike the classical traits or qualitative traits, where each trait is controlled by the expression of a single or very few genes to produce a discontinuous variation.
Question
a) Which characters might fall at location 1?
b) Is there another way to map one of these traits on this tree?
c) Which characters would fall at location 3?
d) Can you come up with some traits that would fall at location 5 that are not included in the table?
b) Is there another way to map one of these traits on this tree?
c) Which characters would fall at location 3?
d) Can you come up with some traits that would fall at location 5 that are not included in the table?
Transcribed Image Text:Here are some key traits that distinguish the three domains of life (some of which are from Table
18.1). Consider the tree below showing the relationship of the three groups.
Characteristics
Nuclear envelope
Membrane enclosed organelle
Peptidoglycan in cell wall
Membrane lipids
RNA polymerase
Ribosome
Initiator amino acid for protein
synthesis
Introns in genes
Operons
Plasmids
Response to antibiotics
Bacteria
1
No
No
Yes
2
Bacteria
Unbranched
hydrocarbons
Version 1
70S
Formyl-
methionine
Very rare
Yes
Yes
Sensitive
LUCA
Domain
5
Archaea
streptomycin and chloramphenicol
Response to diptheria toxin
Not sensitive
Sensitive
Histones associated with DNA
No
Yes
Circular chromosome
Yes
Yes
Think through how you would map all of these characteristics onto this tree.
Archaea
No
No
No
Some branched
hydrocarbons
Version 2 (1 copy)
70S
Methionine
Present in some
genes
Yes
Yes
Not sensitive
3
Eukarya
Yes
Yes
No
Eukarya
Unbranched
hydrocarbons
Version 2 (3 copies)
80S
Methionine
Present in many
genes
No
No
Not sensitive
Sensitive
Yes
No
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