Q2-FUN14/Genetics of Common and Complex Disease Flashcards

1
Q

A rare disease is a disease with an incidence of less then 1/__________

A

2000

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2
Q

rare diseases are often, but not always, governed by ______ gene/locus

A

a single

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3
Q

a rare disease is often ______ and _________

A

chronic, life threatening

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4
Q

a rare diesease is often _______ onset and affects _______

A

early, children

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5
Q

it is estimated that ____ to _____ rare diseases exist

A

5K-7K

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6
Q

___-___% of the population is affected by a rare disease

A

6 - 8

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7
Q

A common diesease is ______ or _______ in nature

A

polygenic, multifactorial

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8
Q

Are common dieseases chronic?

A

they can be

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9
Q

When are common diseases early or later in life?

A

onset of common disease is usually later in life

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10
Q

What does monogenic/mendelian mean?

A

Presence or absence of phenotype depends on genotype at a single locus

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11
Q

What does polygenic mean?

A

Presence or absence of phenotype depends on genotypes across several loci

(but all risk is attributable to genes)

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12
Q

What does multifactorial mean?

A

Presence or absence of phenotype depends on interaction of genes and environment

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13
Q

what is the biological complexity of common and rare diseases?

A

common ones are complex and rare ones are relatively simple

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14
Q

What is The Genome Wide Association Study?

A
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15
Q

What does the GWAS study do with regards to statistical analysis?

A

determine the frequency of each SNP in cases and then in controls… test if there is a significant difference

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16
Q

What is the P-value?

A

P-value = a measure of statistical significance, the probability of that result occurring by chance.

– P = 0.05 means 1/20 chance of that result occurring by chance.

– Need to apply a significance threshold for your study, which is determined by the number of independent tests you intend to run

– For GWAS, approximately one million independenttests

– Therefore, P value threshold = 0.00000005 (5x10-8)

17
Q

What is the Odds ratio?

A
18
Q

Look at the 3 case studies on this lecture.

A
19
Q

_____________ in the human genome have been associated with common disease and complex traits

A

thousands of loci

20
Q

_______ genetic risk factors have been studied via GWAS

A

common

21
Q

________ are very small (OR<1.2) for the most part

A

effect sizes

22
Q

the ability to predict individuals at risk of developing disease is _________

A

very modest

23
Q

The loci identified in GWAS has pointed to ________ for the development of novel treatments

A

new biological targets

24
Q

Why do more than half of clinical trials fail?

A

the lack of efficacy of the drug

25
Q
A