Chapter 11
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Created by:
fancypants_31 on January 16, 2012
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13 terms
Terms | Definitions |
|---|---|
 autosome | chromosome that is not a sex chromosome |
| carrier | individual heterozygous for a recessive disorder such as cystic fibrosis and Tay-Sachs disease |
| codominance | complex inheritance pattern that occurs when neither allele is dominant and both alleles are expressed |
| epistasis | interaction between alleles in which one allele hides the effects of another allele |
| incomplete dominance | complex inheritance pattern in which the heterozygous phenotype is intermediate between those of the two homozygous parent organisms |
| karyotype | micrograph in which the pairs of homologous chromosomes are arranged in decreasing size |
| multiple alleles | having more than two alleles for a specific trait |
| nondisjunction | cell division in which the sister chromatids do not separate correctly, resulting in gametes with an abnormal number of chromosomes |
| pedigree | diagrammed family history that is used to study inheritance patterns a trait through several generations and that can be used to predict disorders in future offspring. |
| polygenic trait | characteristic, such as eye color or skin color, that results from the interaction of multiple gene pairs. |
| sex chromosome | X or Y chromosome; paired sex chromosomes determine an individual's gender; XX individuals are female and XY individuals are male. |
| sex-linked trait | characteristic, such as red-green color blindness, controlled by genes on the X chromosome; also called an X-linked trait. |
| telomere | protective cap made of DNA that is found on the ends of a chromosome. |
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