Genetics (definitions)
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1
Gene
segment of DNA that codes for a protein
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DNA
a very long molecule that holds our genes. has a double helix shape
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Double Helix
two strands of DNA wind around each other like a twisted ladder
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Chromosomes
threadlike structures made of DNA molecules that contain the genes
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Gametes
sex cells
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Fertilization
the fusion of sex cells to form a zygote
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Zygote
a single cell formed through fertilization
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Embryo
multi-celled stage when the zygote divides to form more cells
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Heterozygous
two different alleles
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Homozygous
two identical alleles
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Genotype
genetic makeup of an organism
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Phenotype
the physical expression of the genotype, what we see
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asexual reproduction
Process by which a single parent reproduces by itself
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sexual reproduction
reproduction in which cells from two parents unite to form the first cell of a new organism
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