nucleotides - basic building block of DNA that includes a phosphate group, a sugar group and nitrogenous base, chromosomes - a long strand of DNA coiled up around histones., genes - sections of DNA that code for a specific protein., DNA replication - the process by which DNA makes an exact copy of itself., alleles - a version of a gene, homozygous - having 2 identical alleles for a trait, heterozygous - having 2 different alleles for a trait, phenotype - the physical characteristics that result from an interaction between the genotype and the environment., genotype - the combination of alleles for a particular trait., sex-linked - when a gene is located on a sex chromosome and is therefore associated with gender., carrier - a person who carries an allele for a disease but isn’t suffering from the disease, pedigree charts - shows a record of genes passed down through families, autosomal - when when a gene is located on a non-sex chromosome,

Genetics Definitions

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