Model organisms Flashcards

1
Q

Two main groups of model organisms?

A

Invertebrates and vertebrates

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2
Q

Examples of model organism invertebrates?

A

Fruit flies, nematodes, urchin

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3
Q

Examples of vertebrate model organisms?

A

Frogs, mice, chickens, zebrafish

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4
Q

Main considerations when choosing a model organism?

A

of embryos, cost, access, micromanipulation, genetics, gene inventory

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5
Q

Sea urchin name?

A

Strongylocentrotus purpurantus

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6
Q

Pros of sea urchin as a model organism?

A

Short generation time, fast embryogenesis, large number of progeny, transparent embryo, fully sequenced genome, easy to grow

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7
Q

Who demonstrated artificial embryo twinning?

A

Hans Driech

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8
Q

What did advanced embryo twinning show?

A

Each cell in the embryo has a full set of genetic info and so is capable of growing into a full organism

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9
Q

Fruit fly name?

A

Drosophila melanogaster

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10
Q

Pros of fruit fly?

A

Short life, lots of progeny, easy and cheap to maintain, can manipulate larvae, easy to make mutants, fully sequenced genome

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11
Q

Who first linked a specific gene to a specific chromosome?

A

Thomas hunt morgan

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12
Q

Who isolated and characterised the trithorax homeotic gene mutation in Drosophila melanogaster?

A

Philip Ingham

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13
Q

Nematode name?

A

Caenorhabditis elegans

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14
Q

Pros of nematodes as a model organism?

A

Short gen time, large # of progeny, rapid embryogenesis, cheap to bread, can be frozen, transparent, easy to disrupt gene function

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15
Q

What was the first fully sequenced multicellular organism?

A

Caenorhabditis elegans (nemantodes)

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16
Q

Whos research led to the mapping of the whole nervous system of nemantodes, and proposed they should be used as model organisms?

A

Sydney Brenner

17
Q

Frog name?

A

Xenopus laevis

18
Q

Pros of a frog as a model organism?

A

Large number of eggs, rapid development, easy and cheap to maintain, large egg, easy to manipulate, tetraploid genome which is sequenced

19
Q

Who cloned frogs using a nucleus from a somatic cell?

A

John Gurdon

20
Q

Who discovered that adult cells can be converted to stem cells?

A

John Gurdon

21
Q

Who developed the three-signal model for mesoderm induction?

A

Jonathan Slack

22
Q

Chicken name?

A

Gallus gallus

23
Q

Pros of chicken as a model organism?

A

Good progeny numbers, easy to incubate eggs, easy to manipulate surgically, diploid, genome is sequenced

24
Q

Who developed an embryo manipulation technique to produce chimeric embryos?

A

Nicole Le Douarin

25
Who determined that precursors in the neural crest were multipotent?
Nicole Le Douarin
26
Mouse name?
Mus musculus
27
Pros of mouse as a model organism?
Reasonable progeny numbers, large colonies, short embryogenesis, transgenics easy to obtain, genome sequenced
28
Cons of a mouse as a model organism?
Expensive to maintain and difficult to access embryos
29
Who was the first scientist to culture mouse cells?
Martin Evans
30
Who was the first to generate transgenic mice by injection of genetically modified embryonic stem cells into blastocysts
Martin Evans
31
Zebrafish name?
Danio rerio
32
Pros of zebrafish as a model organism?
Large progeny, transparent embryo, genome sequenced, easy to manipulate gene expression
33
Who set up a large scale mutagenesis screen of zebrafish embryos?
Christiane Nüsslein-Volhard