An Obstetrician Knows That One of Her Patients Is a Pregnant

question 33

Multiple Choice

An obstetrician knows that one of her patients is a pregnant woman whose fetus is at risk for a serious disorder that is detectable genetically in fetal cells. The obstetrician would most reasonably offer which of the following procedures to her patient?

• A)CVS
• B)ultrasound imaging
• C)amniocentesis
• D)blood transfusion
• E)X-ray

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Definitions:

Phenotypes

The set of observable characteristics or traits of an organism, resulting from the interaction of its genotype with the environment.

Monozygotic Twins

Another term for identical twins, referring to siblings that develop from one zygote that splits and forms two embryos, sharing all their genetic material.

Dizygotic Twins

Also known as fraternal twins, are twins that develop from two different eggs fertilized by two different sperm cells.

Fraternal Twins

Also known as dizygotic twins, these are siblings born at the same time who have developed from two different eggs fertilized by two different sperm, thus they are genetically distinct and not identical.