Module 2 Genetics Flashcards

1
Q

Clinical Genetic Purpose

A
  • Genetic disorder care
  • Prenatal diagnosis
  • Cancer genetics
  • Newborn screening
  • Metabolic genetics
  • Population screening
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2
Q

Load of Genetic Disease

A
  • Miscarriages
  • Congenital anomaly
  • Chromosome anomaly
  • Pediatric admissions
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3
Q

Genotype

A
  • Genetic makeup
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4
Q

Phenotype

A
  • Physical manifestation
  • Inherited trait/disease
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5
Q

New Dominant

A
  • People with condition in each generation
  • Males/females affected
  • Forms of transmission
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6
Q

Polycystic Kidney Disease

A
  • Bilateral renal cysts
  • Liver cysts
  • Intracranial aneurysms risk
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7
Q

Autosomal Recessive

A
  • Equal males/females
  • Sid ship in 1 generation
  • Increase consanguinity
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8
Q

Cystic Fibrosis

A
  • European population prevalence
  • CFTR gene mutation
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9
Q

X-Linked Inheritance

A
  • Mostly male affected
  • Female carrier to son (possible)
  • Male carrier to son (not possible)
  • Carrier females mildly affected
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10
Q

Males Affected by X-Linked

A
  • 1 X chromosome
  • Must express all x-linked genes
  • Hemizygous
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10
Q

Females Affected by X-Linked

A
  • XX pairing
  • Gene prevents symptoms
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11
Q

Duchenne Muscular Dystrophy

A
  • Affect males in 20’s
  • Cannot reproduce
  • Mutation inherited from mother/de novo
  • Increase in spontaneous mutation (1/3)
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12
Q

Mitochondrial DNA Disorders

A
  • Inherited from mother in egg
  • Mitochondria have own DNA
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13
Q

Mitochondrial Multisystemic Disorders

A
  • Diabetes
  • Hearing loss
  • Limited eye movement
  • Cardiomyopathy
  • Fatigue & low tone
  • Cognitive dysfunction
  • Feeding difficulties
  • Constipation
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14
Q

G-Banded Chromosomes

A
  • Euploid
  • Karyotype
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15
Q

Chromosomal Disorders

A
  • Numerical anomaly
  • Structural anomaly
16
Q

Nondisjunction

A
  • Meiosis I
  • Most common trisomy 21 cause
17
Q

Trisomy 21

A
  • 47 total chromosomes
  • XY
  • Third 21st chromosome
18
Q

Down Syndrome

A
  • Extra 21st chromosome
  • Distinct facial features
  • Developmental delay
  • Heart defects
19
Q

Trisomy 21 Severity

A
  • Nondisjunction (highest)
  • Translocation
  • Mosaic (mild)
20
Q

Structural Anomalies

A
  • Recombination error
  • Balanced or unbalanced
21
Q

Balanced Reciprocal Translocation

A
  • No clinical effects for carrier
  • Risk for stillbirths/miscarriages
22
Q

Trisomy 13

A
  • Patau syndrome
  • Midline defects
  • Cleft palate
  • Extra finger
  • Developmental delay
  • Death within first year of life
23
Q

Trisomy 18

A
  • Edward syndrome
  • Majority female
  • Cardiac defects
  • Developmental delay
  • Death within first year of life
24
Q

Turner Syndrome

A
  • 45X
  • Puffy hands & feet at birth
  • Webbed neck
  • Coarctation of aorta
  • Short stature
  • Amenorrhea & infertility
  • Normal intelligence
25
Q

Klinefelter Syndrome

A
  • 47 XXY
  • Tall stature
  • Gynecomastia (large breast)
  • Small testes
  • Learning disability prone
  • Infertility