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| A characteristic that an organism can pass on to its offspring through its genes. |
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| The passing of traits from parents to offspring. |
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| The scientific study of heredity. |
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| An organism that always produces offspring with the same form of a trait as the parent. |
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| A segment of DNA on a chromosome that codes for a specific trait. |
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| The different forms of a gene. |
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| An allele whose trait always shows up in the organism when the allele is present. |
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| An allele that is masked when a dominant allele is present. |
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| An organism that has two different alleles for a trait; an organism that is heterozygous for a particular trait. |
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| The likelihood that a particular event will occur. |
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| A chart that shows all the possible combinations of alleles that can result from a genetic cross. |
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| An organism’s physical appearance, or visible traits. |
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| An organism’s genetic makeup, or allele combinations. |
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| Having two identical alleles for a trait. |
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| Having two different alleles for a trait. |
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| A condition in which neither of two alleles of a gene is dominant or recessive. |
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| The process that occurs in sex cells (sperm and egg) by which the number of chromosomes is reduced by half. |
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| RNA that copies the coded message from DNA in the nucleus and carries the message into the cytoplasm. |
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| RNA in the cytoplasm that carries an amino acid to the ribosome and adds it to the growing protein chain. |
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Definition
| A change in a gene or chromosome. |
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