Vocabulary important to the 7th grade study of genetics
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
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| Dominant Trait | A trait that will always be expressed in the phenotype
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| Chromosome | Structure passed from parent to offspring
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| Alleles | Different forms of the same gene
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| Genotype | The set of genes carried by an organism
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| Hybrid | Another term for heterozygous
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| Homozygous | An organism with two of the same inherited alleles
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| Mutation | A random change in an organism's DNA
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| Genetics | The study of how traits are inherited
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| Heterozygous | An organism with two alleles that are different
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| Phenotype | The physical expression of a gene
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| Inherited Traits | Characteristics that are passed from parent to offspring
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| Punnett Square | Tool used to help make predictions about inheritance
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| Recessive Trait | A trait that will only be expressed if two copies are present
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| Purebred | Another name for homozygous
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| Genotype | Examples include HH, Hh, hh
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| Phenotype | Examples include brown eyes, widow's peak
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| Homozygous Dominant | An example is BB
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| Homozygous Recessive | An example is bb
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| Heterozygous | An example is Bb
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| Purebred | Examples are BB and bb
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| Hybrid | Examples are Bb
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| Gene | Units of inheritance located on chromosomes
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| DNA | molecule of inheritance located in the nucleus of cells
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| Alleles | Units of inheritance that compose genes
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| Acquired Traits | Examples include the ability to learn, dyed purple hair, pierced ears
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| Incomplete dominance | A pattern of inheritance where the two inherited alleles blend to form the phenotype for organisms inheriting the heterozygous genotype.
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| Co- dominance | A pattern of inheritance where the two inherited alleles for a trait both show up.
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| Incomplete dominance | An example would be red flowers and white flowers producing pink flowers
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| Co- dominance | An example would be black chickens and white chickens mating to produce offspring that are speckled both black and white.
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