Growth and Development Practice Questions

Q: At what age can a child remove front-opening garments?

36 months. This question tests the knowledge of **Adaptive/Self-help milestones**, which are frequently asked in NEET-PG. ### **Explanation** By **36 months (3 years)**, a child develops the fine motor coordination and cognitive planning required to unbutton large buttons and manipulate clothing. At this age, a child can **remove front-opening garments** (like an unbuttoned shirt or jacket) and put on shoes (though usually on the wrong feet). ### **Analysis of Options** * **24 months (2 years):** At this stage, the child can assist in dressing and can remove simple items like socks and shoes if they are loose, but they lack the dexterity to handle front-opening garments or buttons. * **36 months (3 years):** **(Correct Answer)** The child can unbutton large buttons and remove front-opening clothes. They can also put on a T-shirt but may require help with fasteners. * **48 months (4 years):** By this age, the child is more independent. They can **dress and undress fully** (except for laces and back buttons) and can distinguish the front from the back of the clothing. * **60 months (5 years):** The child achieves advanced fine motor skills, such as **tying shoelaces** and handling complex fasteners like zippers and snaps independently. ### **High-Yield Clinical Pearls for NEET-PG** * **Dressing Milestones Summary:** * **1 year:** Pulls off socks/hat. * **2 years:** Removes shoes/socks; helps pull down pants. * **3 years:** Removes front-opening garments; unbuttons large buttons. * **4 years:** Dresses/undresses independently (except laces). * **5 years:** Ties shoelaces. * **Key Fine Motor Correlation:** The ability to unbutton at 3 years coincides with the ability to copy a **circle**. * **Rule of Thumb:** Undressing (easier) is always mastered before dressing (harder).

Q: A 3-month-old child presents with a typical mewing cry and congenital heart disease. Which chromosome abnormality is associated with these findings?

5p deletion. **Explanation:** The clinical presentation of a "mewing cry" (resembling a kitten) combined with congenital heart disease is the hallmark of **Cri-du-chat Syndrome** (Cat's cry syndrome). This condition is caused by a partial deletion of the **short arm (p) of chromosome 5** [1]. 1. **Why 5p deletion is correct:** The characteristic high-pitched, monochromatic cry is due to abnormal laryngeal development and neurological impairment [1]. Associated features include microcephaly, round "moon-like" face, hypertelorism, and intellectual disability. Congenital heart defects (most commonly VSD, PDA, or ASD) occur in about 15-20% of cases. 2. **Why other options are incorrect:** * **5q deletion:** Deletions of the long arm of chromosome 5 are associated with myelodysplastic syndrome (5q- syndrome) in adults, not congenital pediatric syndromes. * **4p deletion:** This causes **Wolf-Hirschhorn Syndrome**. While it also involves midline defects, it is characterized by a "Greek warrior helmet" facies (prominent glabella), cleft lip/palate, and seizures, rather than a cat-like cry. * **9p deletion:** Known as Alfi's syndrome, it presents with trigonocephaly and upward slanting palpebral fissures, but lacks the specific laryngeal cry. **High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic:** "p" stands for *petit* (short arm); "q" stands for *queue* (long arm). * **Cri-du-chat** = 5p deletion [1]. * **Wolf-Hirschhorn** = 4p deletion. * The cry in Cri-du-chat usually disappears as the child grows older, making early diagnosis crucial. * Most cases (85%) are de novo deletions, while the remainder result from unequal crossing over or parental translocation [1].

Q: At what age does an infant typically begin to discriminate between familiar and unfamiliar people (stranger anxiety)?

20 weeks. **Explanation:** The development of social milestones in an infant follows a predictable chronological sequence. The correct answer is **20 weeks (5 months)**, as this is the age when an infant begins to distinguish their primary caregivers from strangers. This cognitive milestone is the precursor to "stranger anxiety," which typically peaks later, between 7 and 9 months. **Analysis of Options:** * **A. 4 weeks:** At this stage, the infant is in the neonatal period. Social milestones are minimal, though they may begin to watch a parent's face intently. * **B. 8 weeks:** This is the classic age for the **Social Smile**. The infant smiles in response to a face or voice but does not yet discriminate between individuals. * **C. 12 weeks:** The infant enjoys social interaction and may laugh aloud, but they remain generally accepting of all friendly caregivers. * **D. 20 weeks (Correct):** By 5 months, the infant develops "selective" social responses. They recognize familiar faces, show preference for the mother/caregiver, and may become quiet or wary when a stranger approaches. **High-Yield Clinical Pearls for NEET-PG:** * **Social Smile:** 2 months (8 weeks) — *A very frequent MCQ topic.* * **Recognizes Mother:** 3 months (12 weeks). * **Stranger Anxiety:** Starts at 5–6 months; peaks at 7–9 months. * **Mirror Recognition:** 18 months (Self-awareness). * **Separation Anxiety:** Usually begins at 9 months and peaks at 12–15 months. * **Social Play:** Parallel play is characteristic of 2-year-olds; cooperative play begins at 3–4 years.

Q: According to Scammon’s growth curves, which of the following tissues shows a growth pattern that can help predict the timing of the adolescent growth spurt?

Reproductive tissues. **Explanation:** Scammon’s growth curves categorize the postnatal growth of various body tissues into four distinct patterns: **Neural, Lymphoid, General, and Reproductive.** **Why Reproductive tissues is correct:** The reproductive (genital) curve remains latent during childhood (showing less than 10% growth) and undergoes a dramatic, rapid acceleration during puberty. Because this surge in reproductive tissue growth coincides precisely with the onset of puberty, it is the most reliable predictor for the timing of the **adolescent growth spurt**. The surge in sex hormones (androgens and estrogens) drives both the maturation of reproductive organs and the peak height velocity seen in adolescence. **Analysis of Incorrect Options:** * **Neural tissues:** These show extremely rapid growth in early childhood. By age 6, the brain and skull have reached nearly 90% of their adult size. This pattern is unrelated to the adolescent spurt. * **Lymphoid tissues:** These follow a unique "overshoot" pattern. They reach their peak (nearly 200% of adult size) around age 10–12 (pre-puberty) and then undergo atrophy/involution as reproductive tissues begin to grow. * **General tissues:** (Not listed as an option but relevant) These follow an "S-shaped" or sigmoid curve, showing rapid growth in infancy, a plateau in childhood, and a second spurt in adolescence (muscles, bones, viscera). **High-Yield Clinical Pearls for NEET-PG:** * **Order of growth completion:** Neural (earliest) → General → Reproductive (latest). * **Lymphoid involution:** The thymus and tonsils shrink during puberty due to the rise in sex hormones. * **Key Age:** By age 2, the brain is 75-80% of its adult weight. * **Exception:** The **Adrenal glands** follow a unique pattern—they decrease in size significantly after birth and then increase again during "adrenarche."

Q: Which disorder is characterized by craniosynostosis, craniofacial anomalies, severe symmetrical syndactyly (cutaneous and bony fusion) of the hands and feet, præracial polysyndactyly, and variable soft-firm syndactyly?

Carpenter syndrome. **Explanation:** The clinical presentation described is characteristic of **Carpenter Syndrome** (Acrocephalopolysyndactyly Type II). It is an autosomal recessive disorder caused by mutations in the *RAB23* or *MEGF8* genes. The hallmark features that distinguish it from other craniosynostosis syndromes are the combination of **craniosynostosis** (cloverleaf skull), **facial dysmorphism**, and specific limb anomalies—notably **symmetrical syndactyly** and **preaxial polydactyly** (extra digits on the thumb/great toe side). **Analysis of Options:** * **Carpenter Syndrome (Correct):** The presence of **polydactyly** (specifically preaxial) alongside syndactyly is the "pathognomonic" differentiator in a child with craniosynostosis. * **Apert Syndrome:** While it features craniosynostosis and severe "mitten-hand" syndactyly, it **does not** typically present with polydactyly. It is autosomal dominant and associated with advanced paternal age. * **Crouzon Syndrome:** Characterized by craniosynostosis, proptosis, and maxillary hypoplasia, but it is distinctively noted for having **normal extremities** (no syndactyly or polydactyly). * **Down Syndrome:** A chromosomal anomaly (Trisomy 21) characterized by hypotonia, flat facial profile, and Simian crease, but not primary craniosynostosis or complex syndactyly. **High-Yield Clinical Pearls for NEET-PG:** * **Mnemonic for Carpenter:** "Carpenter builds extra (Polydactyly) fingers." * **Apert vs. Carpenter:** Apert = Syndactyly only; Carpenter = Syndactyly + Polydactyly. * **Associated features of Carpenter:** Congenital heart defects (PDA, VSD), hypogonadism, and obesity. * **Inheritance:** Most craniosynostosis syndromes (Apert, Crouzon, Pfeiffer) are **Autosomal Dominant**, but Carpenter is **Autosomal Recessive**.

Q: What is the expected age for a child to have a pincer grasp and say bisyllabic words?

9 months. This question tests the integration of **fine motor** and **language** milestones, a high-yield area for NEET-PG. ### **Explanation** At **9 months** of age, a child typically achieves two landmark milestones: 1. **Immature Pincer Grasp:** The ability to pick up small objects (like a pea) using the pads of the thumb and index finger. This evolves into a *mature* pincer grasp (using fingertips) by 12 months. 2. **Bisyllabic Speech:** The child begins "polysyllabic babbling," repeating sounds like "da-da," "ma-ma," or "ba-ba" without specific meaning (non-specific). ### **Analysis of Incorrect Options** * **6 months:** At this stage, the child uses a **unidextrous reach** and a **palmar grasp** (using the whole palm). Language is limited to monosyllables (e.g., "pa," "da," "ma"). * **18 months:** By this age, fine motor skills have advanced to building a **tower of 3–4 cubes** and feeding themselves with a spoon. Language includes a vocabulary of about 10–20 words and identifying body parts. * **24 months:** The child can build a **tower of 6 cubes**, kick a ball, and use **2-word sentences** (telegraphic speech) with a vocabulary of ~50–100 words. ### **High-Yield Clinical Pearls for NEET-PG** * **Pincer Grasp Evolution:** 9 months (Immature/Pad-to-pad) → 12 months (Mature/Tip-to-tip). * **Handedness:** Usually determined by **2–3 years**. If a child shows a strong hand preference before 18 months, suspect a motor deficit (like hemiplegic CP) in the contralateral limb. * **Social Milestone at 9 months:** **Stranger anxiety** typically peaks at this age. * **Object Permanence:** Also develops around 9–10 months (Piaget’s Sensorimotor stage).

Q: The maximum growth spurt in girls is seen at the time of:

Menarche. In girls, the **Peak Height Velocity (PHV)**—the period of maximum growth—typically occurs about 6 months to 1 year **before** the onset of menstruation (Menarche). However, in the context of clinical milestones, the growth spurt is most closely associated with the period leading up to and including the time of menarche. By the time menarche occurs, the growth velocity has already begun to decelerate, and girls usually grow only an additional 5–7 cm before epiphyseal closure due to the effects of estrogen. **Explanation of Options:** * **Thelarche (B):** This is the first sign of puberty (breast budding, SMR Stage 2). The growth spurt *begins* shortly after thelarche but does not reach its peak until later. * **Pubarche/Adrenarche (A & D):** These refer to the appearance of pubic hair and the maturation of the adrenal cortex. While they occur during puberty, they are not the primary drivers or chronological markers for the peak growth spurt. * **Menarche (C):** While PHV technically precedes menarche, menarche serves as the definitive clinical marker that the peak growth period is concluding. In multiple-choice questions, it is the standard answer for the timing of the maximum spurt relative to late-pubertal milestones. **High-Yield Clinical Pearls for NEET-PG:** * **Sequence in Girls:** Thelarche → Pubarche → Peak Height Velocity → Menarche (Mnemonic: **T**all **P**eople **G**et **M**oney). * **Sequence in Boys:** Testicular enlargement (first sign) → Pubarche → Growth Spurt (occurs later in boys, usually SMR Stage 4). * **Growth Potential:** Once menarche occurs, linear growth potential is significantly limited because high estrogen levels cause rapid fusion of the epiphyseal plates.

Q: Peak growth velocity in adolescent girls is indicated by which of the following?

The period just before menarche. **Explanation:** In adolescent girls, the **Peak Height Velocity (PHV)**—the period of maximum growth rate—occurs during **Tanner Stage 2 or 3**, typically about **6 months to 1 year before the onset of menarche**. By the time a girl reaches menarche, she has already passed her peak growth spurt and has usually achieved about 95–98% of her final adult height. Post-menarche, the average height gain is limited to only 5–7 cm due to the fusion of epiphyseal plates caused by rising estrogen levels. **Analysis of Options:** * **The period just before menarche (Correct):** This aligns with the physiological sequence where the growth spurt precedes the final stage of pubertal maturation (menarche). * **Breast enlargement (Thelarche):** This is usually the **first sign of puberty** in girls (Tanner Stage 2). While it signals the start of the pubertal process, the peak velocity occurs slightly later. * **Pubic/Axillary hair growth (Adrenarche/Pubarche):** These are markers of adrenal androgen activation. While they occur during puberty, they do not correlate as precisely with the peak of the linear growth spurt as the pre-menarcheal window does. **High-Yield Clinical Pearls for NEET-PG:** * **Sequence of Puberty in Girls:** Thelarche (Breast) → Pubarche (Hair) → Peak Height Velocity → Menarche (**Mnemonic: B-P-H-M**). * **Sequence in Boys:** Testicular enlargement (≥4ml) is the first sign, followed by pubic hair and then the growth spurt. * **Timing Difference:** Girls reach PHV approximately 2 years earlier than boys (Tanner Stage 2-3 in girls vs. Tanner Stage 4 in boys). This explains why girls are often taller than boys in early adolescence.

Q: Premature exfoliation of deciduous teeth is seen in which of the following conditions?

Hypophosphatasia. **Explanation:** **Hypophosphatasia** is the correct answer. It is a rare genetic metabolic disorder characterized by a deficiency of the tissue-nonspecific alkaline phosphatase (TNSALP) enzyme. This deficiency leads to impaired mineralization of bones and teeth. In the oral cavity, the lack of alkaline phosphatase results in **defective cementum formation** on the roots of teeth. Without proper cementum, the periodontal ligaments cannot attach the teeth securely to the alveolar bone, leading to the hallmark clinical sign: **painless, premature exfoliation of deciduous teeth** (typically the incisors) before the age of five. **Analysis of Incorrect Options:** * **Hypophosphatemia:** While low serum phosphate (as seen in Vitamin D resistant rickets) affects bone mineralization, it typically causes delayed eruption or spontaneous dental abscesses due to large pulp chambers, rather than premature exfoliation. * **Hyperphosphatasia:** Also known as Juvenile Paget’s disease, this involves accelerated bone turnover and cortical thickening, but it is not a classic cause of early tooth loss. * **Hyperparathyroidism:** This condition leads to subperiosteal bone resorption and "salt and pepper" appearance of the skull. While it can cause loss of the *lamina dura* around the teeth, it does not typically cause premature exfoliation of deciduous teeth. **High-Yield Clinical Pearls for NEET-PG:** * **Most common cause** of premature primary tooth loss is **Hypophosphatasia**. * **Differential Diagnosis for Premature Tooth Loss:** Remember the mnemonic **"H-P-L-C"**: **H**ypophosphatasia, **P**apillon-Lefèvre syndrome (associated with palmar-plantar keratoderma), **L**eukemia/Langerhans Cell Histiocytosis, and **C**hediak-Higashi syndrome. * **Biochemical marker:** Low serum Alkaline Phosphatase (ALP) and elevated urinary phosphoethanolamine are diagnostic for Hypophosphatasia.

Question 1

At what age can a child remove front-opening garments?

Accepted Answer

36 months

Answer

24 months

Answer

48 months

Answer

60 months

Question 2

A 3-month-old child presents with a typical mewing cry and congenital heart disease. Which chromosome abnormality is associated with these findings?

Accepted Answer

5p deletion

Answer

5g deletion

Answer

4p deletion

Answer

9p deletion

Question 3

At what age does an infant typically begin to discriminate between familiar and unfamiliar people (stranger anxiety)?

Accepted Answer

20 weeks

Answer

4 weeks

Answer

8 weeks

Answer

12 weeks

Question 4

According to Scammon’s growth curves, which of the following tissues shows a growth pattern that can help predict the timing of the adolescent growth spurt?

Accepted Answer

Reproductive tissues

Answer

Neural tissues

Answer

Lymphoid tissues

Answer

None of the above

Question 5

Which disorder is characterized by craniosynostosis, craniofacial anomalies, severe symmetrical syndactyly (cutaneous and bony fusion) of the hands and feet, præracial polysyndactyly, and variable soft-firm syndactyly?

Accepted Answer

Carpenter syndrome

Answer

Crouzon syndrome

Answer

Apert syndrome

Answer

Down syndrome

Question 6

What is the expected age for a child to have a pincer grasp and say bisyllabic words?

Accepted Answer

9 months

Answer

18 months

Answer

6 months

Answer

24 months

Question 7

Which of the following is a feature of Patau syndrome?

Accepted Answer

Rocker bottom foot

Answer

Cleft lip

Answer

Hypotelorism

Answer

Holoprosencephaly

Question 8

The maximum growth spurt in girls is seen at the time of:

Accepted Answer

Menarche

Answer

Pubarche

Answer

Thelarche

Answer

Adrenarche

Question 9

Peak growth velocity in adolescent girls is indicated by which of the following?

Accepted Answer

The period just before menarche

Answer

Breast enlargement

Answer

Axillary hair growth

Answer

Pubic hair growth

Question 10

Premature exfoliation of deciduous teeth is seen in which of the following conditions?

Accepted Answer

Hypophosphatasia

Answer

Hypophosphateremia

Answer

Hyperphosphatasia

Answer

Hyperparathyroidism

Growth and Development — MCQs

Growth and Development — MCQs

On this page

Practice by Chapter

Want unlimited practice?