Punnett square - chart that predicts an offspring's traits (genotype & phenotype), genotype - genetic make-up; always represented by letters Pp PP pp, phenotype - physical description of genotype Ex. AA =STRAIGHT HAIR, dominant - traits that are always expressed. represented by capital letters AA or Aa, recessive - traits that hide if a dominant is present, only show up if there's 2 (aa)., heterozygous - different alleles (Aa), homozygous - same alleles (AA dominant or aa recessive), heredity - the transfer of genetic information from parent to offspring., traits - characteristics of an organism; can be genetic (inherited) or acquired (learned)., DNA - deoxyribonucleic acid contains information creating the hereditary materials in a cell's nucleus; a genetic blueprint., genes - the basic physical and functional unit of heredity, made of DNA., chromosomes - threadlike structures made of DNA molecules that contain the genes (Humans have 23 pairs) except in the sex cells., Gregor Mendel - "Father of Genetics" discovered heredity by growing and studying pea plants., allele - alternative form of a gene.,

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