section of DNA that codes for a protein and determines a trait
specific characteristic that varies from one individual to another
alternative forms of a gene
trait that will show up in an organism's phenotype if gene is present
trait that will only appear in the phenotype if organism inherits two of them; covered up by the dominant gene
separation of alleles during meiosis or gamete formation
sex cell; sperm or egg
offspring of a cross between parents with different traits; heterozygous
inherited two identical alleles for a trait; homozygous or purebred
likelihood an event will occur
physical characteristics of an organism, observable or measurable
diagram that shows the possible results of a genetic cross; parents' gametes on top and left, offsprings' genotypes inside
genetic makeup of an organism
has two identical alleles for a particular trait; true-breeding or purebred, ex. PP or pp
has two different alleles for a particular trait; hybrid, ex. Pp
principle that genes do not influence each other's inheritance because they are separated independently during meiosis
three or more alleles exist for a particular trait
creates a blended phenotype; one allele is not completely dominant over the other
trait controlled by two or more genes; shows a wide variety of phenotypes
both genes contribute to the phenotype of the organism, ex. spotted or striped
error in meiosis in which homologous chromosomes don't separate; gametes end up with wrong number of chromosomes
trait related to a gene that is found on the X or Y chromosomes
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