Genetics: Species and Reproduction
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alleles | A different form of a gene.
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codominant | An inheritance pattern in which both alleles can be observed in a phenotype.
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DNA | The abbreviation for deoxyribonucleic acid, an organism's genetic material.
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dominant trait | A genetic factor that blocks another genetic factor.
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genes | A section of DNA on a chromosome that has genetic information for one trait.
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genetics | The study of how traits are passed from parents to offspring.
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genotype | The alleles of all the genes on an organism's chromosomes; controls an organism's phenotype.
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heredity | The passing of traits from parents to offspring.
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heterozygous | A genotype in which the two alleles of a gene are different.
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homozygous | Pairs of chromosomes that have genes for the same traits arranged in the same order.
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Law of Independent Assortment | Each member of a pair of homologous chromosomes separates independently of the members of other pairs so the results are random.
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Law of Segregation | Members of a pair of homologous chromosomes separate during the formation of gametes and are distributed to different gametes so that every gamete receives only one member of the pair.
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Mendelian genetics | Shows a dominant and recessive relationship and genes are passed on from two parents (sexual reproduction).
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mutation | A permanent change in the sequence of DNA, or the nucleotides, in a gene or a chromosome.
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nucleotide | A molecule made of nitrogen base, a sugar, and a phosphate group.
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pedigree | A way to track traits through multiple generations.
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phenotype | How a trait appears or is expressed.
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polygenic inheritance | An inheritance pattern in which multiple genes determine the phenotype of a trait.
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Punnett Square | A model that is used to show the probability of all possible genotypes and phenotypes of offspring.
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recessive trait | A genetic factor that is blocked by the presence of a dominant factor.
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replication | The process of copying a DNA molecule to make another DNA molecule.
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RNA | Ribonucleic Acid: A type of nucleic acid that carries the code for making proteins from the nucleus to the cytoplasm.
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traits | A characteristic feature or quality distinguishing a particular person or thing.
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transcription | The process of making mRNA from DNA.
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translation | The process of making a protein from RNA.
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