Derived Character Definition Biology

Presentation on theme: "Warm-Up 3/24 What is a acquired characteristic? What is a clade?"— Presentation transcript:


1 Warm-Up 3/24 What is a obtained characteristic? What is a clade?Circle a clade on the cladogram below.

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2 Chapter 18 – Classification18.2 Modern Evolutionary Category

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3 Group is Based on Evolutionary Relationships (CLADISTICS)Phylogeny—the study of exactly how living and extinct organisms are pertained to one another.

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4 Cladograms Cladogram - is an evolutionary tree made making use of cladistics (ancestral relationships) More closely connected species share the most derived characteristics

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5 Derived CharacteristicsDiagram supplies obtained personalities to organize & ararray species Derived Characteristic - a trait that occurred in the most recent prevalent ancestor of a specific lineage and was passed along to its descendants.

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6 Cladogram

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7 Clades Clade - a team of species that includes:A single common ancestor All descendants of that ancestor, both living and extinct. Cannot incorporate any kind of species that are not descended from that prevalent ancestor. B is the ancestral species to… I is the ancestral species to…

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8 Building Cladograms A speciation event = ancestral family tree branched into two new lineperiods – Branch allude is dubbed a node. The bottom of the tree represents the prevalent ancestor mutual by all organisms..

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9 Building Cladograms -2 A cladogram’s branching patterns show degrees of relatedness among organisms. Which lineperiods are most very closely related and why? 2&3 1&4 3&4 1&2

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10 Building Cladograms - 3 Represents the existing expertise about evolutionary relationships among vertebrates. Question: Form one hypothesis around evolutionary relationships based off the cladogram listed below.

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11 Reading Cladograms This cladogram shows a streamlined phylogeny of the cat family members.

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12 Reading Cladograms – QuestionsWhich node represents the prevalent ancestor of four- limbed pets in the cladogram? Branch point at Amphibians What does the order of the forks represent? Order in which various groups branched off over the course of evolution. All organisms on the cladogram share which obtained characteristic? Four Limbs

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13 Reading Cladograms – QuestionsWhich derived character specifies the clade Carnivora? Specialized shearing teeth Retractable clegislations is a obtained character mutual just by members of clade___________ . Felidae

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14 Cladogram

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15 Cladogram Facts Each derived character defines a clade.Derived characters that appear “lower” on the cladogram than the branch point for a clade are not derived for that particular clade. Is hair a obtained character for the clade carnivora? No!! NO

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16 Cladograms Facts Smaller clades are nested within the bigger clades.

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17 Clades and also Traditional Taxonomic GroupsToday’s reptiles are all descended from a common ancestor. Modern birds, yet, are likewise descended from that ancestor.

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18 Genes as Derived CharactersAll organisms lug hereditary indevelopment in their DNA passed on from earlier generations. Wide arrays of organisms share a number of genes that can be used to identify evolutionary relationships.

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