Growth and Development Practice Questions

Q: All are common in Down syndrome, except?

Respiratory tract infection uncommon. **Explanation:** The correct answer is **D (Respiratory tract infection uncommon)** because children with Down syndrome (Trisomy 21) are actually **highly predisposed** to recurrent respiratory tract infections (RTIs). This increased susceptibility is due to a combination of anatomical and physiological factors: * **Anatomical:** Midface hypoplasia, narrow nasopharynx, and macroglossia lead to poor drainage. * **Physiological:** Generalized hypotonia (affecting chest expansion) and a high prevalence of laryngomalacia. * **Immunological:** Associated immune deficiencies (T and B cell dysfunction). * **Comorbidities:** Congenital heart disease (causing pulmonary congestion) and Gastroesophageal reflux (leading to aspiration). **Analysis of Incorrect Options:** * **A. Simian Crease:** A single transverse palmar crease is a classic dysmorphic feature seen in approximately 45-50% of Down syndrome cases. * **B. Clinodactyly:** This refers to the permanent incurving of the fifth finger (pinky) due to hypoplasia of the middle phalanx, a very common skeletal finding in these patients. * **C. Mother's age > 35 years:** Advanced maternal age is the most significant risk factor for non-disjunction, which accounts for 95% of Down syndrome cases. **High-Yield Clinical Pearls for NEET-PG:** * **Most common Cardiac Defect:** Endocardial Cushion Defect (AV Canal Defect); however, **VSD** is often cited as the most common specific defect in some Indian datasets. * **Gastrointestinal:** Duodenal atresia ("Double bubble" sign) and Hirschsprung disease. * **Hematology:** Increased risk of Transient Myeloproliferative Disorder (TMD) in neonates and **ALL** (Acute Lymphoblastic Leukemia) later in childhood (though AML-M7 is specifically associated). * **Screening:** First-trimester screening includes low PAPP-A and high β-hCG, combined with increased Nuchal Translucency (NT) on ultrasound.

Q: Which of the following statements about fragile X syndrome is FALSE?

Micro-orchidism is a characteristic feature.. **Explanation:** Fragile X Syndrome is the most common cause of **inherited** intellectual disability and the second most common genetic cause of intellectual disability after Down Syndrome. **1. Why Option C is the Correct (False) Statement:** The characteristic feature of Fragile X Syndrome is **Macro-orchidism** (enlarged testes), not micro-orchidism. This typically becomes prominent post-puberty (testicular volume >25 ml). Micro-orchidism is instead associated with conditions like Klinefelter Syndrome (47, XXY). **2. Analysis of Other Options:** * **Option A (True):** The name "Fragile X" comes from a cytogenetic "break" or gap seen at the **long arm (q arm)** of the X chromosome (specifically at Xq27.3) when cells are cultured in a folate-deficient medium. * **Option B (True):** It is a common genetic disorder, affecting approximately 1 in 4,000 males and 1 in 8,000 females. * **Option D (True):** Distinctive craniofacial features include a **long, narrow face**, prominent forehead, and large, everted ears. **Clinical Pearls for NEET-PG:** * **Genetics:** Caused by an unstable **CGG trinucleotide repeat** expansion in the **FMR1 gene**. * **Inheritance:** It follows an X-linked dominant pattern with variable expressivity and **genetic anticipation**. * **Clinical Triad:** Intellectual disability, large protuberant ears, and macro-orchidism. * **Behavioral Phenotype:** Often associated with ADHD, hand-flapping, and features of Autism Spectrum Disorder. * **Diagnosis:** Molecular testing via **PCR** or Southern Blot (to count CGG repeats) is the gold standard.

Q: Which of the following developmental milestones is achieved first?

Mirror play. To answer this question correctly, one must compare the chronological age at which each milestone typically appears. **1. Why Mirror Play is Correct:** Mirror play is a social milestone that appears at **6 months** of age. At this stage, the infant smiles at their own reflection and enjoys interacting with the "image" in the mirror. Since 6 months is the earliest age among the given options, it is the milestone achieved first. **2. Analysis of Incorrect Options:** * **Crawling (8 months):** This is a gross motor milestone where the infant moves with the abdomen touching the floor (belly crawl). * **Creeping (9 months):** This occurs after crawling; the infant moves on all fours with the abdomen off the floor. * **Pincer Grasp (9–10 months):** This is a fine motor milestone. The **immature** pincer grasp (using the palm and fingers) appears at 9 months, while the **mature** pincer grasp (using the tips of the thumb and index finger) appears at 10 months. **3. High-Yield Clinical Pearls for NEET-PG:** * **Sequence of Locomotion:** Remember the order: Sitting without support (6m) → Crawling (8m) → Creeping (9m) → Standing with support (9m) → Cruising/Walking with furniture (10-11m) → Walking alone (12-15m). * **Social Milestones:** Social smile (2m) → Recognizes mother (3m) → Mirror play (6m) → Stranger anxiety (7-9m) → Bye-bye (9m). * **Red Flag:** If a child does not have a social smile by 3 months or cannot sit without support by 9 months, developmental delay should be suspected.

Q: A 6-year-old child presents with mild mental retardation, superiority in musical aptitude, and social amiability. The child has a distinctive but subtle physical appearance described as 'elfin appearance'. Which of the following best describes the child's condition?

Williams Syndrome. ### Explanation **Correct Option: B. Williams Syndrome** Williams Syndrome (also known as Williams-Beuren Syndrome) is a multisystem genetic disorder caused by a **microdeletion on chromosome 7q11.23**, which includes the **elastin (ELN) gene**. The clinical triad presented in the question is classic: 1. **Elfin Facies:** Characterized by a broad forehead, periorbital puffiness, stellate iris pattern, short upturned nose, long philtrum, and wide mouth with full lips. 2. **Cognitive Profile:** Mild to moderate intellectual disability paired with a unique "cocktail party personality" (extreme friendliness and social amiability) and a remarkable affinity for music and storytelling. 3. **Cardiovascular Association:** The most common cardiac lesion is **Supravalvular Aortic Stenosis (SVAS)** due to elastin deficiency. **Incorrect Options:** * **A. Kanner-Asperger Syndrome:** Kanner syndrome refers to classic Autism, while Asperger syndrome involves social impairment without significant language or cognitive delay. Neither presents with "elfin" facies or the specific social extroversion seen in Williams syndrome. * **C. Renpenning Syndrome:** An X-linked intellectual disability syndrome characterized by microcephaly, lean build, and small testes. It lacks the musical aptitude and facial features of Williams syndrome. * **D. Paington Syndrome:** This is not a standard recognized pediatric growth/developmental syndrome; it is likely a distractor. **High-Yield Clinical Pearls for NEET-PG:** * **Metabolic Abnormality:** Idiopathic **infantile hypercalcemia** is a classic association. * **Diagnosis:** Confirmed via **FISH** (Fluorescence In Situ Hybridization) or chromosomal microarray to detect the 7q11.23 deletion. * **Key Cardiac Lesion:** Supravalvular Aortic Stenosis (SVAS) is the "buzzword" for exams. * **Personality:** Often described as "hypersociability" or "cocktail party" behavior.

Q: What is a developmental milestone typically achieved by a 1.5-year-old child?

Scribble spontaneously. At 18 months (1.5 years) of age, a child undergoes significant refinement in fine motor skills and symbolic play. **Scribbling spontaneously** is a hallmark fine motor milestone for this age. While a 15-month-old may scribble after a demonstration (imitation), the 18-month-old initiates the action independently. **Analysis of Options:** * **A. Build a tower of 6 blocks:** This is a **2-year (24 months)** milestone. At 15 months, a child builds a tower of 2 blocks; at 18 months, they build a tower of 3–4 blocks. * **B. Speak 10-25 meaningful words:** This is typically seen at **21 months**. An 18-month-old usually has a vocabulary of about 10 words. By 2 years, they use 50+ words and 2-word phrases. * **C. Scribble spontaneously (Correct):** This is the classic fine motor milestone for **18 months**. It signifies the development of the palmar supinate grasp and the cognitive intent to create marks. * **D. Point to 3-4 body parts:** This is a **2-year (24 months)** language/cognitive milestone. An 18-month-old can typically point to only 1 body part. **High-Yield Clinical Pearls for NEET-PG:** * **Tower of Blocks Rule:** Age in years × 3 (e.g., 2 years = 6 blocks; 3 years = 9 blocks). *Exception: 18 months = 3-4 blocks.* * **Handedness:** Usually determined by **2–3 years**. If a child shows a strong hand preference before 18 months, suspect contralateral motor deficit (e.g., hemiplegic CP). * **Stairs:** 18 months = climbs stairs with one hand held; 2 years = climbs stairs two feet per step (independently).

Q: A boy can grasp a rattle and has recently learned to transfer objects from one hand to another. What developmental milestone can he likely achieve next?

Babble. ### Explanation **Concept Breakdown:** The child in the question has mastered **transferring objects from one hand to another**, a milestone typically achieved at **6 months** of age. To answer this question, you must identify the milestone that occurs immediately after or around the same time as the 6-month mark. **Why Option A is Correct:** * **Babbling** (polysyllabic speech like "ba-ba-ba") typically begins at **6 months**. * Since the child is already transferring objects (6 months), babbling is the most developmentally appropriate "next" or concurrent milestone. **Analysis of Incorrect Options:** * **B. Say 'mama' or 'dada' (Specific):** This is a **10-month** milestone. While a child might say "mama/dada" non-specifically at 9 months, specific usage is much later than the current 6-month stage. * **C. Sit without support:** This is achieved at **8 months**. At 6 months, a child typically sits *with* support (tripod position). * **D. Stand with support:** This is a **9-month** milestone. **High-Yield NEET-PG Clinical Pearls:** * **Hand-to-hand transfer:** 6 months (requires disappearance of the Palmar Grasp reflex). * **Pincer Grasp:** Immature at 9 months; Mature at 12 months. * **Social Smile:** 2 months (the first social milestone). * **Stranger Anxiety:** 7–9 months. * **Rule of Thumb for Sitting:** 5 months (with support), 8 months (without support). **Summary Table for 6 Months:** * **Gross Motor:** Sits with support (Tripod). * **Fine Motor:** Transfers objects; reaches for objects (unidextrous reach). * **Language:** Monosyllables/Babbling. * **Social:** Recognizes parents; prefers mother.

Q: Which of the following is NOT a feature of Prader-Willi syndrome?

Cafe-au-lait spots. **Explanation:** Prader-Willi Syndrome (PWS) is a complex genetic disorder caused by the loss of function of genes in the **paternal** copy of the chromosome **15q11-q13** region (most commonly via microdeletion or maternal uniparental disomy). **Why Cafe-au-lait spots is the correct answer:** Cafe-au-lait spots are hyperpigmented skin lesions characteristic of **Neurofibromatosis Type 1 (NF1)**, McCune-Albright syndrome, or Fanconi anemia. They are **not** a feature of Prader-Willi syndrome. In fact, patients with PWS often exhibit **hypopigmentation** (fair skin and light-colored hair) compared to their family members due to the involvement of the *OCA2* gene located near the PWS critical region. **Analysis of incorrect options:** * **Congenital hypotonia:** This is a hallmark feature. Infants present as "floppy babies" with poor suckling reflex and feeding difficulties in the neonatal period. * **Obesity and hyperphagia:** Between ages 1 and 6, the initial feeding difficulty transitions into uncontrollable hunger (hyperphagia) and a lack of satiety, leading to early-onset morbid obesity if not strictly managed. * **Mental retardation:** Most children with PWS have mild to moderate intellectual disability along with behavioral issues like temper tantrums and skin picking. **High-Yield Clinical Pearls for NEET-PG:** * **Genetics:** Remember "P" for **P**rader-Willi = **P**aternal deletion. (Maternal deletion results in Angelman Syndrome). * **Clinical Triad:** Hypotonia, Hypogonadism (undescended testes/micropenis), and Hyperphagia. * **Physical Features:** Almond-shaped eyes, thin upper lip, and small hands/feet (acromicria). * **Diagnosis:** DNA methylation analysis is the preferred initial screening test.

Q: A child begins to sit with support, is able to transfer objects from one hand to another, and speaks monosyllabic babbles at what age?

6 months. This question tests the integration of milestones across three domains: Gross Motor, Fine Motor, and Language. ### **Explanation of the Correct Answer** At **6 months**, a child typically achieves the following milestones: * **Gross Motor:** Sits with support (propped on hands or with external assistance). * **Fine Motor:** Transfers objects from one hand to another (palmar grasp is well-developed). * **Language:** Begins monosyllabic babbling (e.g., "ba," "da," "ma"). * **Social:** Recognizes strangers (stranger anxiety begins around this time). ### **Analysis of Incorrect Options** * **3 months:** The child achieves **neck holding** (gross motor), follows objects 180° (fine motor), and produces **cooing** sounds (language). They cannot sit or transfer objects yet. * **9 months:** The child **sits without support**, crawls/creeps, and develops a **pincer grasp** (using thumb and index finger). Language progresses to **bisyllables** (e.g., "mama," "dada"). * **12 months:** The child **stands without support** or walks with one hand held. They can drop an object into a narrow neck container and speak **1-2 words with meaning**. ### **High-Yield Clinical Pearls for NEET-PG** * **Handedness:** Usually develops by **2-3 years**. If a child shows a strong hand preference before 18 months, it may indicate a neurological deficit in the contralateral limb. * **Social Smile:** Appears at **2 months** (a very high-yield milestone). * **Object Permanence:** Develops around **9 months** (the child looks for a hidden toy). * **Mirror Play:** A 6-month-old enjoys looking at themselves in a mirror and smiles at the image.

Q: A child is able to say sentences of 6 words. What is the likely age of this child?

4 years. ### Explanation The development of language is a critical milestone in pediatric growth. A child’s ability to form sentences is directly proportional to their age in years, following a predictable clinical "rule of thumb." **1. Why 4 years is correct:** The most reliable clinical pearl for language development is that **the number of words in a child's typical sentence equals their age in years.** * At **4 years**, a child can typically construct sentences of **4 to 6 words**. * Additionally, at this age, their speech should be 100% intelligible to strangers, and they begin to use past tense and tell simple stories. **2. Analysis of Incorrect Options:** * **2 years:** A 2-year-old typically uses **2-word phrases** (e.g., "Want milk," "Go out"). Their vocabulary is roughly 50–200 words, and speech is about 50% intelligible to strangers. * **3 years:** A 3-year-old uses **3-word sentences** (Subject-Verb-Object, e.g., "I want cookie"). Speech is 75% intelligible, and they can state their name, age, and gender. * **5 years:** A 5-year-old uses complex sentences of **5 to 6+ words**. They can define simple words, use future tense, and identify coins/colors. **3. NEET-PG High-Yield Clinical Pearls:** * **Intelligibility Rule:** 2 years = 50% intelligible; 3 years = 75% intelligible; 4 years = 100% intelligible. * **Vocabulary Milestones:** * 1 year: 1–3 words. * 18 months: 10–20 words. * 2 years: 50–200 words. * **Red Flag:** If a child does not have single words by 15 months or 2-word phrases by 2 years, a formal hearing and developmental assessment are required.

Question 1

All are common in Down syndrome, except?

Accepted Answer

Respiratory tract infection uncommon

Answer

Simian crease

Answer

Clinodactyly

Answer

Mother's age > 35 years

Question 2

Which of the following statements about fragile X syndrome is FALSE?

Accepted Answer

Micro-orchidism is a characteristic feature.

Answer

There is a breakage in the long arm of the X chromosome.

Answer

It is a common genetic disorder.

Answer

A long face is a common facial feature.

Question 3

Which of the following is true about the growth chart shown below?

Accepted Answer

It is used for serial assessment of growth status of a girl.

Answer

It is a growth velocity curve.

Answer

It can be used to know whether a child has wasting or not.

Answer

It cannot detect 'failure to thrive'.

Question 4

Which of the following developmental milestones is achieved first?

Accepted Answer

Mirror play

Answer

Crawling

Answer

Creeping

Answer

Pincer grasp

Question 5

A 6-year-old child presents with mild mental retardation, superiority in musical aptitude, and social amiability. The child has a distinctive but subtle physical appearance described as 'elfin appearance'. Which of the following best describes the child's condition?

Accepted Answer

Williams Syndrome

Answer

Kanner-Asperger Syndrome

Answer

Renpenning Syndrome

Answer

Paington Syndrome

Question 6

What is a developmental milestone typically achieved by a 1.5-year-old child?

Accepted Answer

Scribble spontaneously

Answer

Build a tower of 6 blocks

Answer

Speak 10-25 meaningful words

Answer

Point to 3-4 body parts

Question 7

A boy can grasp a rattle and has recently learned to transfer objects from one hand to another. What developmental milestone can he likely achieve next?

Accepted Answer

Babble

Answer

Say 'mama' or 'dada'

Answer

Sit without support

Answer

Stand with support

Question 8

Which of the following is NOT a feature of Prader-Willi syndrome?

Accepted Answer

Cafe-au-lait spots

Answer

Congenital hypotonia

Answer

Obesity and hyperphagia

Answer

Mental retardation

Question 9

A child begins to sit with support, is able to transfer objects from one hand to another, and speaks monosyllabic babbles at what age?

Accepted Answer

6 months

Answer

3 months

Answer

9 months

Answer

12 months

Question 10

A child is able to say sentences of 6 words. What is the likely age of this child?

Accepted Answer

4 years

Answer

2 years

Answer

3 years

Answer

5 years

Growth and Development — MCQs

Growth and Development — MCQs

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