Genetics 2 Flashcards

1
Q

Method of becoming aneuploid where chromatids stay together

A

Nondisjunction

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2
Q

Method of becoming aneuploid where one chromatid gets left behind in cytoplasm and is lost

A

Anaphase lag

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3
Q

Mosaicism is common in sex or autosomal chromosomes?

A

Sex chromosomes

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4
Q

two or more cell populations with different chromosome complements in a single organism

A

Mosaicism

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5
Q

Inversion that does not involve centromere

A

Paracentric

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6
Q

Inversion that involves centromere (involves both arms, p and q)

A

Pericentric

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7
Q

Describes a deletion where two breaks in chromosome arm with intervening material lost

A

Interstitial

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8
Q

Describes a deletion where one break in arm with loss of chromosome end

A

Terminal

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9
Q

two chromosome breaks and intervening material is inverted and reincorporated into chromosome

A

Inversion

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10
Q

one arm is lost and remaining arm is duplicated; resulting chromosome has two short or two long arms

A

Isochromosome

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11
Q

rearrangements involving 2 or more nonhomologous chromosomes

A

Translocation

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12
Q

Type of translocation involving Two acrocentric chromosomes (really short small arms)
Long arms fuse at centromere and Short arms are lost
Parent may be normal phenotype but pass disease on to children

A

Robertsonian translocation

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13
Q

Genetics lab technique:
DNA pol runs in presence of differentially labeled nucleotides
Analyzing the length of the copies and the type of label of each allows construction of the sequence

A

Sanger sequencing

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14
Q

Genetics lab technique: similar to Sanger but is massively parallel, millions of fragments are sequenced per run

A

Next generation sequencing

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15
Q

Genetics lab technique: identifies variations in length of amplified segment
E.g. used to detect Fragile X syndrome

A

Amplicon length analysis

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16
Q

Genetics lab technique: Molecular probe (nucleotide sequence) is labeled with a fluorescent tag
This sequence is made to complement the target sequence
Probe is incubated with cells to see if the target DNA sequence is present

A

Fluorescence in situ hybridization (FISH)

17
Q

Genetics lab technique: Orderly arrays of spots, each with a specific DNA segment
If complementary DNA strands are present in patient sample, they will hybridize
Detection system: red signal and green signal; yellow signal (both signals/genes present)
May also use a tagged antibody specific for the nucleic acid hybrid (hybrid capture)
Can produce millions of data points at once

A

DNA microarray