Nursing: Critical Components of Nursing Care, 4th Edition By
Roberta Durham; Linda Chapman; Connie Miller ( ) /
9781719645737 / Chapter 1-19/ All Chapters with Answers
and Rationals
Dominant vs Recessive Genes - ANSWER: Genes are either dominant or Recessive:
When dominant and recessive genes are paired, the traits of the dominant gene will be present; If 2
recessive genes are paired, the trait portrayed will be recessive.
Sex-Linked Inheritence - ANSWER: Conditions can either be X-linked or Y-linked
Sex-Linked Inheritance: Male Children - ANSWER: Always going to be dominant (X,Y)
If a male receives an x chromosome with the mutated gene and the y chromosome doesn't carry, it
becomes dominant
Sex-Linked Inheritance: Female Children - ANSWER: (X,X)
Females who have one x chromosome with a sex-linked disorder do not present with the trait, but are
carriers.
Sex-Linked Inheritance: Y-Linked - ANSWER: Only passable from Father to son since Males are (X,Y)
Carrier Testing - ANSWER: Identify individuals who carry one copy of a gene mutation when there is a
family history of a genetic disorder
Preimplantation Testing - ANSWER: Used to detect genetic changes in embryos create using assisted
reproductive techniques.
Prenatal Testing - ANSWER: Allows for the early detection of genetic disorders such as trisomy 21,
hemophilia, and Tay-Sachs disease
Newborn Screening - ANSWER: Used to detect genetic disorders that can be treated early in life.
Nursing Actions for Genetic Testing - ANSWER: Providing additional information about the genetic
disorder
Referring them to support groups for parents who have children with the same genetic disorder
Providing a list of websites that contain accurate information about the disorder
Explaining that they will experience grief over the loss of the "dream child" and that this is normal
Encouraging them to talk openly to each other about their feelings and concerns.
Sickle Cell Anemia - ANSWER: The most common genetic disease among people of African ancestry.
Sickle-cell hemoglobin forms rigid crystals that distort and disrupt red blood cells; oxygen-carrying
capacity of the blood is diminished.
Cystic Fibrosis - ANSWER: The most common genetic disease among people of European ancestry.
, Production of thick mucus clogs in the bronchial tree and pancreatic ducts.
Most severe effects are chronic respiratory infections and pulmonary failure.
Tay-Sachs Disease - ANSWER: The most common genetic disease among people of Jewish ancestry.
Degeneration of neurons and the nervous system results in death by the age of 2 years.
Phenylketonuria (PKU) - ANSWER: Lack of an enzyme to metabolize the amino acid phenylalanine
leads to severe mental and physical retardation.
These effects may be prevented by the use of a diet (beginning at birth) that limits phenylalanine.
Huntington's disease - ANSWER: Uncontrollable muscle contractions between the ages of 30 and 50
years, followed by loss of memory and personality.
Hemophilia (X-Linked) - ANSWER: Lack of factor VIII impairs chemical clotting
May be controlled with factor VIII from donated blood
Duchenne's Muscular Dystrophy (X-Linked) - ANSWER: Replacement of muscle by adipose or scar
tissue, with progressive loss of muscle function; often fatal before age 20 years due to involvement of
cardiac muscle.
Teratogens - ANSWER: Effects on fetal development or embryonic development abnormalities during
pregnancy
Teratogens: Drugs - ANSWER: Alcohol, Angiotensin-Converting Enzyme (ACE) Inhibitors,
anticonvulsants, cocaine, warfarin
Teratogens: Infections - ANSWER: Cytomegalovirus (CMV), Varicella, Rubella, Syphilis, Toxoplasmosis,
Zika
Scrotum - ANSWER: Loose bag of skin and connective tissue in which the two testes are suspended.
Facilitates the production of viable sperm
Around 96 degrees Fahrenheit.
Testes - ANSWER: Develop near the kidney and normally descent into the scrotum before birth
Each of the two testes is divided into lobes that contain several seminiferous tubules in which
spermatogenesis takes place.
Sperm travel from the seminiferous tubules and through the rete testis and enter the epididymis
Epididymis - ANSWER: Coiled, tube-like structure on the posterior surface of each testis, inside which
sperm complete their maturation
Ductus Deferens - ANSWER: Vas deferens (Highway for Sperm)
Extends from the epididymis into the abdominal cavity
In the abdominal cavity, it extends over the urinary bladder, where it joins with the ejaculatory duct