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Bio Vocab Week 2 Q 3
Biology Vocabulary Chapter 11 Sections 1-3
Term | Definition |
---|---|
carrier | An individual who is heterozygous for a recessive disorder. |
pedigree | A diagram that traces the inheritance of a particular trait through several generations. |
incomplete dominance | Where the heterozygous phenotype is an intermediate phenotype between the two homozygous phenotypes. |
codominance | Where both alleles are expressed in the heterozygous condition. An example is sickle cell anemia. |
multiple alleles | Where some forms of inheritance, such as blood groups in humans, are determined. |
epistasis | Where variety is the result of one allele hiding the effects of another allele, |
sex chromosome | The pair of chromosomes that determine the gender of an organism. |
autosome | The other 22 pairs of chromosomes that are not considered gametes or sex chromosomes. |
sex-linked trait | Traits controlled by genes located on the X chromosome. |
polygenic trait | Where phenotypic traits arise from the interaction of multiple pairs of genes. Traits such as skin color, height, eye color, and fingerprint pattern are polygenic traits. |
karyotype | Where pairs of homologous chromosomes are arranged in decreasing size. |
telomere | Protective caps at the end of chromosomes. |
nondisjunction | Cell division during which sister chromatids fail to separate properly, |