BIO UNIT6

vestigial structure as evidence for evolution

They provide strong evidence of common ancestry and can help us trace the evolutionary origin of the species with vestigial structure

Sexual selection

the selection of mates based on heritable traits

True signal

Attractive trait that shows a male is healthy and strong genetically

False signal (aka exaggerated signal)

Attractive trait in a male that lies about being strong and healthy genetically

Base pairing

Adenine+ Thymine, Cytosine+ Guanine

evolution

change in characteristics of populations over time

population

the amount of a species in a given area

natural selection

when beneficial traits for an environment become more common

heritable

passed from a parent to offspring via genetic material (gene)

trait

specific characteristics of an individual

biodiversity

total of the variety of organisms in the biosphere

adaptive radiation

process by which a single species of a small group of species evolves into several different forms

speciation

formation of a new species

genotype

the genes that pass on inherited traits

phenotype

physical trait from your genes

genetic material

nucleic acids like DNA and RNA which contains genes

characteristics

physical traits made from proteins

inheritable

a trait encoded in DNA passed from parent to offspring

comparative anatomy as evidence for evolution

the study of similarities in the anatomical structure of different species. It provides evidence of relativity between different organisms

proteins and amino acids as evidence for evolution

similar proteins show species can be related