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molecule found in the cell nucleus that encodes genetic information


an allele that is always expressed when present


a segment of DNA that determines or helps to determine a trait


the genetic makeup of an organism; the alleles possessed by an organism are represented by symbols (ex: ff)


having 2 alleles that are different


having 2 alleles that are the same


the offspring of genetically different parents


passage of genetic material from parents to offspring


physical appearance of an organism

Punnet Square

diagram that shows the possible offspring of two parents (allows you to determine the probability of each offspring genotype)


allele that is not expressed when the dominant allele is present


a characteristic of an organism


a change or slight difference in condition, amout, or level

selective breeding

a process of breeding a plants and animals for particular traits


genetic material which is found inside of the nucleus in chromosomes

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