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| The passing of physical characteristics from parents to offspring. |
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| The different forms of a gene. |
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| A doubled rod of condensed chromatin; contains DNA that carries genetic information. |
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| A condition in which neither of two alleles of a gene is dominant or recessive. As a result BOTH alleles are expressed in the offspring (You see both traits). |
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Definition
A situation in which neither allele is dominant.
When both alleles are present a “new” phenotype appears that is a blend of each allele. |
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| An allele whose trait always shows up in the organism when the allele is present. |
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| Deoxyribonucleic acid; the genetic material that carries information about an organism and is passed from parent to offspring. |
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| The process in which an egg cell and a sperm cell join to form a new organism. |
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| The set of information that controls a trait. A segment of DNA on a chromosome that codes for a specific trait. |
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| The scientific study of heredity. |
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Definition
| Having two different alleles for a trait. (Hh) |
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Definition
| Having two identical alleles for a trait. (HH or hh) |
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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 process that occurs in the formation of sex cells (sperm and egg) by which the number of chromosomes is reduced by HALF. |
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| The stage of the cell cycle during which the cell's nucleus divides into two new nuclei and one copy of the DNA is distributed into each daughter cell. |
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Definition
| A change in a gene or chromosome. The offspring has a trait different then that of it's parents. |
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| A chart or "family tree" that tracks which members of a family have a particular trait. |
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Definition
| An organism's physical appearance or visible traits. |
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| A number that describes how likely it is that an 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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| The offspring of many generations that have the same traits. |
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Definition
| An allele that is masked when a dominant allele is present. |
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Definition
| A characteristic that an organism can pass on to its offspring through its genes. |
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