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32 Cards in this Set

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Three or more forms of a gene that code for a single trait.
Multiple alleles
A person who has 1 recessive allele for a trait and 1 dominant allele, but does not have the trait.
Carrier
A chart or "family tree" that tracks which members of a family have a particular trait.
Pedigree
A technique by which a small amount of the fluid that surrounds a developing baby is removed; the fluid is analyzed to determine whether the baby will have a genetic disorder.
Amniocentesis
A picture of all the chromosomes in a cell arranged in pairs.
Karyotype
An organism that is genetically identical to the organism from which it was produced.
Clone
All of the DNA in 1 cell of an organism.
Genome
A group of similar organisms that can mate with each other and produce fertile offspring.
Species
A trait that helps an organism survive and reproduce.
Adaptation
The process by which individuals that are better adapted to their environment are more likely to survive and reproduce than other members of the same species.
Natural Selection
Any difference between individuals of the same species.
Variation
The preserved remains or traces of an organism that lived in the past.
Fossil
A fossil formed when minerals replaced all or part of an organism.
Petrified Fossil
A technique used to determine which of 2 fossils is older.
Relative Dating
A technique used to determine the actual age of a fossil.
Absolute Dating
The time it takes for half of the atoms in a radioactive element to break down.
Half-life
A species that does not have any living members.
Extinct
The theory that species evolve during short periods of rapid change.
Punctuated Equilibria
The process of change that occurs during an organism's life to produce a more complex organism.
Development
A change in an organism's surroundings that causes the organism to react.
Stimulus
An action or change in behavior that occurs as a result of a stimulus.
Response
The mistaken idea that living things arise from nonliving sources.
Spontaneous Generation
An organism that makes its own food.
Autotroph
An organism that can't make its own food.
Heterotroph
The maintenance of stable internal conditions despite changes in the surroundings.
Homeostasis
The scientific study of how living things are classified.
Taxonomy
The naming system for organisms in which each organism is given a 2-part name- a genus name and a species name.
Binomial Nomenclature
A classification grouping that consists of a number of similar closely related species.
Genus
A group of similar organisms that can make and produce fertile offspring in nature.
Species
The process by which species gradually change over time.
Evolution
An organism whose cells lack a nucleus and some other cell structures.
Prokaryote
An organism with cells that contain nuclei and other cell structures.
Eukaryote