purebred organism

every specific characteristic of an organism

the scientific study of heredity

an allele that's trait shows up every time when the allele is present

the factors that control a trait

the different forms of a gene

a hidden trait whenever the dominant one is present

a number that describes how likely it is that an event will happen

a chart that shows all of the possible ways alleles can combine in a genetic cross

physical appearance or physical traits

genetic makeup or alleles

an organism containing two identical alleles for a trait is . . .

an organism with two different alleles for a specific trait is . . .

Occurs when one allele is only partially dominant

occurs when both alleles for a gene are expressed equally

three or more possible alleles control the trait

when more or one gene affects a trait

playing the piano well is a inherited trait

human body cells have a total of ______ chromosomes

every organism's reproductive cells have exactly ______ the amount of total chromosomes in that organism's body cells

according to the chromosome theory of inheritance, genes are passed from parents to offspring on chromosomes

chromosomes are made up of many ______ joined together like beads on a string