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Standard 3 Vocab

Standard 3 Vocabulary Words

TermDefinition
Phenotype An organism's physical appearance or physical traits.
Variation Differences
Trait A characteristic that an organism can pass on to its offspring through its genes.
Cloning When a new organism is created that has the exact copy of another organism's genes.
Sperm The male sex cell.
Asexual reproduction A type of reproduction that involves only one parent. The offspring are identical to the parent.
Genotype An organism's genetic makeup or allele combination.
Egg The female sex cell.
Gene One set of instructions for an inherited trait.
Heredity The passing of genetic traits from parents to offspring.
Sexual reproduction A type of reproduction that involves two parents. The offspring will get half their DNA from the father and half from the mother.
Dominant A gene that covers up or dominates the recessive gene.
Punnett Square A chart that shows all of the possible combinations of alleles that can result from a genetic cross.
Chromosome A double rod of chromatin found in the nucleus, 46 in total.
DNA A molecule in all living cells that contains the information that determines the traits that a living thing inherits and needs to live.
Homozygous Having two identical alleles for a trait.
Mutation A change in a gene or chromosomes.
Recessive A gene that is covered up or hidden by the dominant trait.
Allele Different forms of the same gene.
Heterozygous Having two different alleles for a trait.
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