Honors CSI

complete dominance

a relationship in which one allele is completely dominant over another

incomplete dominance

Cases in which one allele is not completely dominant over another. There is a blended heterozygou phenotype.

Codominance

situation in which BOTH alleles of a gene contribute to the phenotype of the organism

multiple alleles

A gene that has more than two alleles

Allele

Different forms of a gene

Trait

A characteristic that an organism can pass on to its offspring through its genes.

sex-linked traits

Traits controlled by genes located on sex chromosomes.

paternity test

A child's allele (band in DNA profile) must come from either the father or the mother. To confirm or discredit a person as the father.

Blood type (group)

One of the classes (as A, B, AB, or O) into which individual vertebrates and especially human beings or their blood can be separated on the basis of the presence or absence of specific antigens in the blood.

antigen on RBC

A, B or RH protein marker that determines blood type

gel electrophoresis

technique for sorting molecules or fragments of molecules by length

Genotype

An organism's genetic makeup, or allele combinations, made of 2 alleles.

Phenotype

An organism's physical appearance, or visible traits.

Who killed Mrs. Fletcher?

Hah- wouldn't you want to know!

XX

female sex chromosomes

Y chromosome

chromosome lacking genes in comparison to the X

Rh factor

Refers to the presence or absence of the Rh antigen on red blood cells.

Carrier

A person who has one recessive allele for a trait, but does not have the trait.

Pedigree

A diagram that shows the occurrence of a genetic trait in several generations of a family.

genetic profiling

the procedure of analyzing the DNA in samples of a person's body tissue or body fluid for the purpose of identification