Standard 3 Vocabulary Words
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| Phenotype | An organism's physical appearance or physical traits.
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| Variation | Differences
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| Trait | A characteristic that an organism can pass on to its offspring through its genes.
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| Cloning | When a new organism is created that has the exact copy of another organism's genes.
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| Sperm | The male sex cell.
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| Asexual reproduction | A type of reproduction that involves only one parent. The offspring are identical to the parent.
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| Genotype | An organism's genetic makeup or allele combination.
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| Egg | The female sex cell.
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| Gene | One set of instructions for an inherited trait.
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| Heredity | The passing of genetic traits from parents to offspring.
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| 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.
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| Dominant | A gene that covers up or dominates the recessive gene.
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| Punnett Square | A chart that shows all of the possible combinations of alleles that can result from a genetic cross.
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| Chromosome | A double rod of chromatin found in the nucleus, 46 in total.
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| DNA | A molecule in all living cells that contains the information that determines the traits that a living thing inherits and needs to live.
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| Homozygous | Having two identical alleles for a trait.
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| Mutation | A change in a gene or chromosomes.
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| Recessive | A gene that is covered up or hidden by the dominant trait.
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| Allele | Different forms of the same gene.
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| Heterozygous | Having two different alleles for a trait.
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