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Ch 7 Sect 1 2 & 4

Vocabulary for Ch 7 Section 1 Pre-AP Biology

Carrier Does not show disease symptoms but can pass on the disease causing allele to offspring
Sex-Linked Genes Genes located on the sex chromosomes
X Chromosome inactivation In each cell of female mammals, one of the two X chromosomes is randomly "turned off"
Incomplete Dominance A heterozygous phenotype is somewhere between the two homozygous phenotypes Neither traits are dominant
Codominance Both traits are fully and separately expressed
Polygenic Traits Traits produced by two or more genes
Epistasis When a gene overshadows the others EX. Albinism
Pedigree Chart Helps trace the phenotypes and genotypes in a family to determine whether people carry recessive alleles
Karyotype A picture of all the chromosomes in a cell. Can show changes to chromosomes.
Created by: 18jacksonc



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