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unit heredity

DNA deoxyribonucleic acid, 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 cell division
mitosis in eukaryotic cells, a process of cell division that forms 2 new nuclei, each of which has the same number of chromosomes
cytokinesis the division of the cytokinesis of a cell
homologous chromosomes that have the same sequence of genes and the same structure
meiosis a process in a cell division during which the number of chromosomes decreases to half the original number by 2 divisions of the nucleus, which results in the production of sex cells
asexual reproduction reproduction that does not involve the union of sex cells and and which one parent produces offspring that are genetically identical to the one parent
sexual repuduction 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 matierial from parent to offspring
gene one set of instructions 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 organism; also the combination of genes for one or more specific traits
phenotype an organism's appearance or other detectable characteristic
dominant in genetics,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 2 alleles are expected such that the phenotype of a heterozygous individual is an intermediate of the 2 homozygous parents
codominance a condition in which 2 alleles are expressed such that the phenotype of a heterozygous individual is a combination of the phenotype of the 2 homozygous parents
punnett square a graph used to predict the results of a genetic cross
probility 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: carington33