Terms in this set (19)
Any trait of an organism that increases its chances of surviving and reproducing.
Variations of genes that determine traits in organisms; the two corresponding alleles and two paired chromosomes constitute a gene.
Structures that transfer heredity information to the next generation.
A form of the trait that dominates or masks (hides) another form of the same trait. Appears more often.
An organism in immediate danger of extinction.
A condition where no individuals in a population survive.
A structure, characteristic, or behavior of an organism, such as eye color, fur pattern, or timing of migration.
The basic unit of heredity carried by the chromosomes; code for features of organisms.
An organism's particular combination of paired alleles. It is the gene makeup of an organism.
A gene composed of two different alleles (a dominant and a recessive).
A gene composed of two identical alleles (e.g. both dominant).
The passing of genetic information (traits) from one generation to the next.
The process by which the individuals best adapted to their environment tend to survive and pass their traits to subsequent generations.
The traits produced by the genotype; the expression of the genes or what the organism looks like.
A form of the trait that is masked or hidden by the dominant form of the trait. Appears less often. This form of the trait can only be seen when the dominant form of the trait is NOT present.
Organisms selected to breed to produce offspring with desirable traits.
An organism present in its range, but threatened because of a decline in numbers.
The specific way a feature is expressed in an individual organism.
The range of expression of a trait within a population.