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Bio Vocab Week 2 Q 3

Biology Vocabulary Chapter 11 Sections 1-3

TermDefinition
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,
Created by: Mr. Bryant
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