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| If an organism has a certain characteristic that is always passed on to its offspring, we say that this organism bred true with respect to that characteristic. |
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Definition
| One of a pair of genes that occupies the same position on homologous chromosomes |
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Definition
| Two-letter set that represents the alleles an organism possesses for a certain trait |
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Definition
| The observable expression of an organism's genes |
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Definition
| A genotype in which both alleles are identical |
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Definition
| A genotype with two different alleles |
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Definition
| An allele that will determine phenotype if just one is present in the genotype |
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Definition
| An allele that will not determine the phenotype unless the genotype is homozygous in that allele |
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Definition
| A cross between two individuals, concentrating on only one definable trait |
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Definition
| A cross between two individuals, concentrating on two definable traits |
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Definition
| Chromosomes that do not determine the sex of an individual |
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Definition
| Chromosomes that determine the sex of an individual |
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Definition
| A protein that, when introduced in the blood, triggers the production of an antibody |
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Definition
| Inheritance of a genetic trait not on a sex chromosome |
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Definition
| A person who is heterozygous in a recessive genetic disorder |
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Definition
| Inheritance of a genetic trait located on the sex chromosomes |
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Definition
| A radical chemical change in one or more alleles |
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Term
| Change in chromosome structure |
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Definition
| A situation in which a chromosome loses or gains genes during meiosis |
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Term
| Change in chromosome number |
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Definition
| A situation in which abnormal ccellular events in meiosis lead to either none of a particular chromosome in the gamete or more that one chromosome in the gamete |
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