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one of a number of different forms of a gene


Both alleles contribute to the phenotype


fusion of male and female gametes


specialized cell involved in sexual reproduction


sequence of DNA that codes for a protein and thus determines a trait


The scientific study of heredity


genetic makeup of an organism


having two different alleles for a trait


having two identical alleles for a trait


offspring of crosses between parents with different traits

incomplete dominance

one allele is not completely dominant over the other allele

independent assortment

the random distribution of the pairs of genes on different chromosomes to the gametes

multiple alleles

three or more alleles of the same gene


physical characteristics of an organism

polygenic traits

trait controlled by two or more genes


a measure of how likely it is that some event will occur

punnett square

diagram showing the gene combinations that might result from a genetic cross


separation of alleles during gamete formation


a characteristic that an organism can pass on to its offspring through its genes.


organisms that produce offspring identical to themselves if allowed to self-pollinate

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