The Correct Answer is {"dropdown-group-1":"C"}
A. Phenylketonuria (PKU) and XYY syndrome: PKU is an autosomal recessive single-gene disorder (not caused by an extra chromosome); XYY is caused by an extra Y chromosome, so only one of these fits.
B. Down syndrome and Turner syndrome: Down syndrome results from an extra chromosome (trisomy 21), but Turner syndrome is monosomy X (a missing X), not an extra chromosome.
C. Klinefelter syndrome and Down syndrome: Both are caused by an extra chromosome (Klinefelter = XXY; Down = trisomy 21).
D. Turner syndrome and sickle-cell anemia: Turner syndrome is due to a missing X chromosome (monosomy), and sickle-cell anemia is a single-gene mutation; neither is caused by an extra chromosome.
Nursing Test Bank
Naxlex Comprehensive Predictor Exams
Related Questions
Correct Answer is C
Explanation
A. initiative versus guilt: Initiative vs. guilt is Erikson’s stage for early childhood (preschool), not adolescence.
B. intimacy versus isolation: Intimacy vs. isolation is the central stage of early adulthood, focusing on forming close relationships.
C. identity versus role confusion: Identity vs. role confusion is Erikson’s stage for adolescence and centers on developing a coherent sense of self.
D. industry versus inferiority: Industry vs. inferiority is the school-age stage (middle childhood), prior to the adolescent identity stage.
Correct Answer is D
Explanation
A. germinal: The germinal period (conception to ~2 weeks) involves implantation and rapid cell division but not the fetal movements and weight gain described.
B. fertilization: Fertilization describes the moment of conception only; it does not cover later morphological changes or growth.
C. embryonic: The embryonic period (weeks 3–8) is when major organs and basic structures form (organogenesis), but the marked weight gain and clearly distinguishable facial features occur later.
D. fetal: The fetal period (week 9 to birth) is characterized by rapid growth, active limb movements, and increasingly distinguishable facial features (face, eyelids, nose, chin).
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