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Definition
| when alleles are neither dominant nor recessive to one another, and both traits of the allels are expressed, but not in a blending pattern |
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Term
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Definition
| when a gene that codes for a certain trait is modified by other genes, this results in the phenotypes that are expressed falling within a continuous range between two extremes |
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Term
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Definition
| examines the effects of crossing two genes with two alleles each |
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Term
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Definition
| the condition where one or more genes which do not code for a trait affect the expression of the trait |
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Term
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Definition
| inheritance patterns that occur when there are no forms if the gene that are dominant. The resulting phenotype is a blend of the allele phenotypes |
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Term
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Definition
| genes that modify the way a trait is expressed and are responsible for epistasis |
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Term
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Definition
| crossing organisims that differ in only one allele that has two different forms |
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Term
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Definition
| three or more alleles that code for the some trait within a population |
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Term
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Definition
| genetic traits the are transmitted from parent to offspring by the sex chromosomes |
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Term
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Definition
| an alternate form of the same gene that codes for a slightly different trait than another allele. |
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Term
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Definition
| inheritable features such as skin color, height, flower color, etc. |
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Term
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Definition
| taking pollen from one flower and pollinating another plant with it |
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Term
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Definition
| a form of a gene whose trait is always expressed |
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Term
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Definition
| the fact that when gametes are formed, the two alleles that code for the same trait separate from one another |
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Term
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Definition
| the entire sequence or content of DNA in an organism |
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Term
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Definition
| the condition where and organism has two different alleles for the same trait |
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Term
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Definition
| the condition where an organism has the same two alleles for a trait |
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Term
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Definition
| where both the alleles for a given trait are dominant |
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Term
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Definition
| where both the alleles for a given trait are recessive. This is the only way a recesive trait can be expressed |
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Term
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Definition
| the expression of the genotype |
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Term
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Definition
| the DNA makeup in an organism |
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Term
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Definition
| a type of mutation that makes an animal unable to produce pigments of the skin, hair, and eyes |
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Term
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Definition
| DNA mutation caused ny nondisjunction of chromosome 21 during meiosis I. |
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Term
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Definition
| when a piece of broken-off chromosome inserts into the homologous chromosome. This results in two copies or the same segment within the same chromosome |
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Term
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Definition
| a change in DNA sequence resulting in the DNA polymerase reading codons incorrectly |
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Term
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Definition
| when a broken off segment of DNA reattaches at the end of the chromosome, or within the chromosome, but in reverse order |
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Term
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Definition
| the term used when a substitute mutation causes an incorrect amino acid to be inserted into the protien |
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Term
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Definition
| environmental conditions which can cause changes in the normal DNA structure |
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Term
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Definition
| when homologous chromosomes do not separate during metaphase I of meiosis |
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