2.4 Ante- And Postnatal Screening Flashcards
Form of a gene coding for a version of a characteristic
Allele
Prenatal test to assess health of Cetus using cells from amniotic fluid
Amniocentesis
Antenatal ultrasound scan that checks for physical abnormalities
Anomaly scan
Use of tests to identify risk of a disorder before birth
Antenatal screening
Allele on chromosomes 1-22; always expressed in phenotype
Autosomal dominant
Allele on chromosomes 1-22; expressed in phenotype if the genotype is homozygous for the recessive allele
Autosomal recessive
Prenatal test to assess health of the fetid using cells from the placenta
Chorionic villus sampling (CVS)
Stage of development up to about 8 weeks that leads to the formation of a fetus
Embryo
Stage of a baby after 8 weeks of development
Fetus
Having two different alleles of the same gene
Heterozygous
Having two identical alleles of the same gene
Homozygous
When an allele is not completely masked by a dominant allele, thus affecting an individual’s phenotype
Incomplete dominance
Display of matched chromosomes produced for medical purposes
Karyotype
Diagram showing the occurrence of phenotypes of a particular gene in a family tree
Pedigree chart
Metabolic disorder that is tested for by postnatal screening
Phenylketonuria (PKU)
