Ch 6B/Ch 7 - Genotype/Phenotype/Pedigrees - Vocab Words

Carrier

organism whose genome contains a gene for a certain trait or disease that is not expressed in the organism’s phenotype

Sex linked gene

gene that is located on a sex chromosome

X chromosome inactivation

process that occurs in female mammals in which one of the X chromosomes is randomly turned off in each cell

Incomplete dominance

heterozygous phenotupe that is a blend of 2 homozygous phenotypes

Codominance

heterozygous genotype that equally expressed the traits of both sides

Polygenic trait

trait that is produced by more than 2 genes

Linkage map

diagram that shows the relative location of genes on a chromosome

Pedigree

chart of phenotype and genotypes in a family that is used to determine whether an individual is a carrier of a recessive allele

Pleiotropy

the control of more than one phenotypic characteristic by a single gene

Karyotype

image of all of the chromosomes in a cell

Traits

inherited characteristics passed on from parent to offspring

Allele

alternate form of gene at the same locus

Locus

location on a chromosome

Test cross

breeding homozygous recessive with an unknown genotype to figure out what it is