BIO153_Lecture_5

Classification by similarity

A method used to determine how closely related different organisms are based on shared traits.

Morphological traits

Physical characteristics used to compare and classify organisms, such as body shape and structure.

Biochemical traits

Characteristics related to the metabolic pathways and biochemical processes within an organism.

Genetic traits

Features determined by genes that can indicate evolutionary relationships among species.

Homology

Similar traits in organisms that are shared due to common ancestry.

Analogy

Similar-looking traits in organisms that are not due to shared ancestry but evolved independently.

Convergent evolution

The process whereby unrelated organisms develop similar traits due to similar environmental pressures.

Shared ancestral character

A trait inherited from a common ancestor that is still present in all or multiple descendants.

Shared derived character

A unique trait that arose in a particular lineage after it diverged from its ancestor.

Orthologous genes

Genes in different species that evolved from a common ancestor and may have similar functions.

Paralogous genes

Genes that are copies of each other within the same species that can evolve independently.

Molecular phylogeny

The analysis of genetic information to determine evolutionary relationships among organisms.

Tetrapods

Four-limbed vertebrates that share a common ancestor.

Skull morphology

The study of the shape and structure of skulls, often used in classifying organisms within the vertebrates.

Diverged

The process in which two or more species develop different traits from a common ancestor over time.

Morphologies

The forms and structures of organisms, used in classification and understanding evolutionary relationships.

Phylogenetic tree

A diagram that represents evolutionary relationships among various species based on genetic or physical traits.

Evolutionary distance

A measure of how different two species are from one another due to evolutionary processes.

Genotype

The genetic constitution of an organism, which can influence its phenotype.

Phenotype

The observable physical characteristics of an organism that result from the interaction of its genotype and environment.

Ribosomal RNA (rRNA)

A type of RNA that is a key component of ribosomes and evolves slowly, making it useful for studying evolutionary relationships.

Molecular genetics

The field of biology that studies the structure and function of genes at a molecular level.

What is classification by similarity?

A method used to determine how closely related different organisms are based on shared traits.

What are morphological traits?

Physical characteristics used to compare and classify organisms, such as body shape and structure.

What are biochemical traits?

Characteristics related to the metabolic pathways and biochemical processes within an organism.

What are genetic traits?

Features determined by genes that can indicate evolutionary relationships among species.

What is homology?

Similar traits in organisms that are shared due to common ancestry.

What is analogy in biological classification?

Similar-looking traits in organisms that are not due to shared ancestry but evolved independently.

What is convergent evolution?

The process whereby unrelated organisms develop similar traits due to similar environmental pressures.

What is a shared ancestral character?

A trait inherited from a common ancestor that is still present in all or multiple descendants.

What is a shared derived character?

A unique trait that arose in a particular lineage after it diverged from its ancestor.

What are orthologous genes?

Genes in different species that evolved from a common ancestor and may have similar functions.

What are paralogous genes?

Genes that are copies of each other within the same species that can evolve independently.

What is molecular phylogeny?

The analysis of genetic information to determine evolutionary relationships among organisms.

What are tetrapods?

Four-limbed vertebrates that share a common ancestor.

What is skull morphology?

The study of the shape and structure of skulls, often used in classifying organisms within the vertebrates.

What does it mean to have diverged?

The process in which two or more species develop different traits from a common ancestor over time.

What are morphologies in biological context?

The forms and structures of organisms, used in classification and understanding evolutionary relationships.

What is a phylogenetic tree?

A diagram that represents evolutionary relationships among various species based on genetic or physical traits.

What is evolutionary distance?

A measure of how different two species are from one another due to evolutionary processes.

What is genotype?

The genetic constitution of an organism, which can influence its phenotype.

What is phenotype?

The observable physical characteristics of an organism that result from the interaction of its genotype and environment.

What is ribosomal RNA (rRNA)?

A type of RNA that is a key component of ribosomes and evolves slowly, making it useful for studying evolutionary relationships.

What is molecular genetics?

The field of biology that studies the structure and function of genes at a molecular level.

Types of Homology

Orthologous and Paralogous