Prenatal Flashcards
– also known as conception, is the process by which sperm and ovum (sex cells) combine to create a single cell called zygote, which then duplicates itself again and again by cell division.
o Fertilization
– rupture of mature follicle in either ovary and expulsion of its ovum which occurs every month until menopause
o Ovulation
also known as Fraternal Twins
o Dizygotic Twins
– resulted from the cleaving of one fertilized egg and are generally genetically identical
o Monozygotic Twins
genetic transmission of heritable characteristics from parents to offspring
o Heredity
– long, spiraling ladder whose steps are made of pairs of chemical units called bases
o Deoxyribonucleic Acid
coils of DNA of smaller segments called genes
o Chromosomes
cell division of non-sex cells
o Mitosis
cell division of sex cells
o Meiosis
mistake in copying genetic code which creates permanent alteration in genetic material
o Mutation
not affiliated to sexual expression
o Autosomes
23rd pair which indicates the baby’s sex (XX, female: XY, male)
o Sex Chromosomes
produce alternative expressions of characteristics
o Alleles
if two alleles are the same
o Homozygous
if two alleles are different
o Heterozygous
– allele that is always expressed or shows up as a trait in that person
o Dominant
– usually doesn’t show unless paired with another recessive trait
o Recessive
– interaction of several genes
o Polygenetic Inheritance
observable characteristics
o Phenotype
underlying genetic makeup
o Genotype
environment can influence when and which genes turn on and off
o Epigenesis
Extra copy of chromosome 21
Down Syndrome
Extra X Chromosome (XXY)
Klinefelter Syndrome
Abnormality in X chromosome causes ID
Fragile X Syndrome
Missing X chromosome for females
Turner Syndrome
Extra Y chromosome
XXY Syndrome
Overproduction of mucus in the lungs and digestive tract
Cystic Fibrosis
Does not produce enough insulin
Diabetes
Delayed blood clotting
Hemophilia
CNS deteriorates producing problem in muscles and mental decline
Huntington’s
Build up of Phenylalanine in the body
Phenylketonuria
Limits body oxygen supply
Sickle-Cell Anemia
Incompletely closed spinal canal
Spina Bifida
Accumulation of lipids in the NS
Tay-Sachs Disease
Absence of brain tissue
Anencephaly
Enlarged Kidneys
Polycystic Kidney Disease
Cirrhosis of the liver in early infancy
Alpha antitrypsin Deficiency
Severe Anemia; nearly all die soon after birth
Alpha Thalassemia
Severe Anemia; fatal in adolescence or Young adulthood
Beta Thalassemia (Cooley’s Anemia)
Males with muscle weakness, minor mental retardation
Duchenne Muscular Dystrophy
carry one bad copy of recessive gene and one good one
o Carriers
effects of similar environment conditions on genetically different individuals
o Genotype-Environment Interaction
environment often reinforces genetic differences
o Genotype-Environment Correlation
parents tend to provide environment that encourages the development of that trait
a. Passive Correlations:
children with differing genetic makeups evoke different reactions from others, other people react to the children’s genetic makeup
b. Reactive or Evocative:
actively selects or create experiences consistent with their genetic tendencies
c. Active:
– tendency to seek out environments compatible with one’s genotype
Niche-Picking
– result from the unique environment in which each child in a family grows up
o Nonshared Environmental
inability to conceive a child
o Infertility
– eggs and sperm are combined in a laboratory dish
o In Vitro Fertilization
– high frequency sound waves are directed into the pregnant woman’s abdomen
No risk to the woman or fetus
Detect abnormalities, no. of fetuses, and sex
- Ultrasound Sonography
uses powerful magnet and radio images to generate detailed images of the body’s organs and structures
- Fetal MRI
– small sample of placenta is removed
Small risk of limb deformity
- Chorionic Villus Sampling