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DNA a molecule that is present in all living cells and that contains the information that determines the traits that a living thing inherits and needs to live
chromosomes in a eukaryotic cell, one of the structures in the nucleus that are made up of DNA and protein; in a prokaryotic cell, the main ring of DNA.
cell cycle the life cycle of a cell
interphase the period of the cell cycle during which activities such as cell growth and protein synthesis occur without visible signs of a cell divisions
mitosis in eukaryotic cells, a process of cell divisions that form two new nuclei, each of which has the same number of chromosomes
cytokinesis the division of the cytoplasm of a cell
asexual reproduction the reproduction that does not involve the union of sex cells and in which one parent produces offspring that are genetically identical to the parent
sexual reproduction reproduction in which the sex cells from two parents unite to produce offspring that share traits from both parents
fertilization the union of a male and female gamete to form a zygote
heredity the passing of genetic material from parent to offspring
gene one set of instruments for an inherited trait
allele one of the alternative forms of a gene that governs a characteristic, such as hair color
genotype the entire genetic makeup of an organism; also the combination of genes for one or more specific traits.
phenotype an organism's appearance or other detectable characteristics
dominant describes an allele that is fully expressed whenever the allele is present in an individual
recessive describes an allele that will be masked unless the organism is homozygous for the trait.
incomplete dominance a condition in which two alleles are expressed such that the phenotype of a heterozygous individual is an intermediate of the phenotypes of the two homozygous parents.
codominance a condition in which two alleles are expressed such that phenotype of a heterozygous individual is a combination of the phenotypes of the two homozygous parents.
punnet square a graphic used to predict the result of a genetic cross.
probability the likelihood that a possible future event will occur in any given instance of the event
ratio a comparison of two numbers using division
pedigree a diagram that shows the occurrence of a genetic trait in several generations of a family.
Created by: BellaRamos