WGU D115 OBJECTIVE ASSESSMENT (OA) EXAM COMPLETE UNIT 1-UNIT 7 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+

WGU D115 OBJECTIVE ASSESSMENT (OA) EXAM COMPLETE UNIT 1-UNIT 7 QUESTIONS AND CORRECT DETAILED ANSWERS WITH RATIONALES (VERIFIED ANSWERS) |ALREADY GRADED A+

WGU D115 OBJECTIVE ASSESSMENT (OA) EXAM 2026-2027

COMPLETE UNIT 1-UNIT 7 QUESTIONS AND CORRECT

DETAILED ANSWERS WITH RATIONALES (VERIFIED

ANSWERS) |ALREADY GRADED A+

Amniocentesis is recommended for pregnant women with what history?

- ANSWER- Have a family history of genetic disorders

What is the technique for prenatal diagnosis of chromosomal

abnormalities at 10-12 weeks gestation? - ANSWER- Chorionic villus

sampling CVS

Amniocentesis during the 15th week of pregnancy

What is the term used for an error in which homologous chromosomes

fail to separate during meiosis or mitosis? - ANSWER- Nondisjunction

What is the most common cause of Down Syndrome? - ANSWERMaternal nondisjunction

embryo now has three copies of chromosome 21

What syndrome, characterized by an absent homologous X chromosome

with only a single X chromosome, exhibits features that include a short

statue, widely spaced nipples, and webbed neck? - ANSWER- Turner

A person with 47, XXY karyotype has the genetic disorder resulting in

which syndrome? - ANSWER- Klinefelter: males

How is transcription best defined? - ANSWER- RNA is synthesized

from a DNA template

Process where the information in a strand of DNA is copied into mRNA

How is translation best defined? - ANSWER- Follows transcription

mRNA leaves nucleus and enters cytoplasm

RNA directs the synthesis of a polypeptides for protein synthesis

An amniocentesis indicates a neural tube defect when an increase in

which protein is evident? - ANSWER- Alpha fetoprotein

Ex: spina bifida or anencephaly

When a child inherits a disease that is autosomal recessive, it is inherited

from whom? - ANSWER- Both parents

In order to have a disorder that is autosomal recessive a pt must inherit

two mutated genes, one from each parent

Cystic fibrosis is caused by what type of gene? - ANSWER- Autosomal

recessive

The BRCA1 and BRCA2 mutations increase the risk of which cancer in

women? - ANSWER- Ovarian, breast, and pancreatic cancers

Prader-Willi syndrome causes a chromosomal defect that is what? -

ANSWER- Inherited from the father

Deletion of a part of chromosome 15

Which type of immunity is produced by an individual after either natural

exposure to the antigen or after immunization against the antigen? -

ANSWER- Active-acquired immunity

What type of immunity is produced when an immunoglobulin crosses

the placenta? - ANSWER- Passive-acquired immunity

Where are antibodies produced? - ANSWER- Plasma cells

When B cells are activated from antigens they develop into plasma cells.

Those plasma cells then create antibodies specific to said antigen

Which antibody initially indicates a typical primary immune response? -

ANSWER- IgM which is found mainly in blood and lymph fluid

First antibody that body makes when fighting a new pathogen

The Common hay fever allergy is expressed through a reaction that is

mediated by which class of immunoglobulins? - ANSWER- IgE

Also releases histamine

What are blood transfusion reactions an example of? - ANSWERAlloimmunity

Type of immunity that produces an immune response against antigens

from members of the same species

Also happens with transplants

What is true of immunodeficiency? - ANSWER- Immunodeficiency is

generally not present in other family members

Mostly from extrinsic factors

A healthcare professional advises patients to exercise because it has

probably impact on reducing which cancer? - ANSWER- Colon