Gene - Sequence of nucleotides that codes for a polypeptide and is the unit of inheritance, Allele - Different forms of the same gene, Dominant - Allele that is expressed in all conditions, Recessive - Allele that is expressed only when both alleles are the same, Co-dominant - Describes the case where both alleles will be expressed in the heterozygote condition, giving an intermediate phenotype, Homozygous - Condition of having two identical alleles for a particular gene, Heterozygous - Condition of having two different alleles for a particular gene, Genotype - Combination of alleles for a particular gene, Phenotype - Expressed (observable) trait of the individual, Mendel's Law of Segregation - During gamete formation, each gamete only receives one copy of each gene, Pair of homologous chromosomes - Pair of chromosomes with the same sequence of gene loci, one from the mother and the other from the father, Continuous variation - Due to the additive effect of multiple genes; trait has intermediate forms, Discontinuous variation - Controlled by one or few genes; trait has few or no intermediate forms, Natural selection - Process in which organisms with desirable genes and phenotypes have a higher chance of surviving and passing on their genes to their offspring, Competition - Interaction between organisms to obtain resources that are limited in supply, Population - Group of individuals of the same species living and interacting with one another in the same habitat, Pure-bred - Organism that is homozygous for a specified trait, Variation - Differences in traits between individuals of the same species, Mutation - Change in the sequence of a gene or in the chromosome number, Evolution - Gradual change in the inheritable characteristics of a population over time,

Heredity - Terms to be familiar with

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