Biology Ch. 7: Extending Mendelian Genetics

Front 1

carrier

Back 1

someone who does not show disease symptoms, but can pass on the disease-causing allele to offspring

Front 2

sex-linked genes

Back 2

genes that are located on the sex chromosomes

Front 3

X chromosome activation

Back 3

a process in each cell of female mammals, wherein one of the two X chromosomes is randomly "turned off"

Front 4

incomplete dominance

Back 4

a heterozygous phenotype is somewhere between the two homozygous phenotypes

Front 5

codominance

Back 5

neither allele is dominant nor recessive and both traits are fully and separately expressed

Front 6

polygenic traits

Back 6

traits produced by two or more genes

Front 7

epistasis

Back 7

one gene that can interfere with the expression of other genes

Front 8

linkage maps

Back 8

maps of the relative locations, or loci, of genes on a chromosome

Front 9

pedigree

Back 9

chart that can help trace the phenotypes and genotypes in a family to determine whether people carry recessive alleles

Front 10

karyotype

Back 10

a picture of all of the chromosomes in a cell where all the the chromosomes are stained with chemicals to produce a pattern of bands on the chromosomes