genetics and heredity vocabulary...genetics and heredity vocabulary 7th grade science. asexual...
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Genetics and Heredity Vocabulary
7th grade Science
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Asexual reproduction
Reproduction that does not involve the union of sex cells and in which one parent produces offspring that are genetically identical to the parent.
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Sexual reproductionReproduction in which the sex cells from two parents unite to produce offspring that share traits from both parents
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HeredityThe passing of genetic material from parent to offspring
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TraitGenetically determined forms of a characteristic that can be expressed in a population.
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GeneOne set of instructions for an inherited trait.
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GeneticsRelating to genes or heredity.
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Deoxyribonucleic Acid (DNA)A molecule that is present in all living cells and that contains the information that determines the traits a living thing inherits and needs to live.
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ChromosomesIn 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.
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AlleleOne of the alternative forms of a gene that governs a characteristic, such as hair color.
H h
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InheritanceThe process by which genetic information is passed on from parent to child.
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Dominant alleleAn allele that is fully expressed whenever the allele is present in an individual.
*(Expressed by an uppercase letter)
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Recessive AlleleAn allele that will be masked unless the organism is homozygous for the trait.*(Expressed by a lowercase letter)
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GenotypeThe entire genetic make-up of an organism; also the combination of genes for one or more specific traits.
*(Two alleles ex: Bb, Aa etc.)
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PhenotypeAn organism’s appearance or other detectable characteristic.