Genetics at Cardiff University | Flashcards & Summaries

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Lernmaterialien für Genetics an der Cardiff University

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Out of Africa model 

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assumes archaic homo in different places in the world was replaced by Homo sapians from Africa

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when is genetic variability at its lowest


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when only single allele & all individuals homozygotes

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What was chedderman?

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The remains of a mesolithic hunter-gather found in chedder gorge

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How does not having only sexual reproduction change the genoype frequencies?

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selfing or asexual reproduction will increase number of homozygotes

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What eveidence does mtDNA and the Y chromosome give for the out of Africa model?


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show that:

- oldest lineages are in Africa

- rest of the world is derived lineages

- pogressive signals of divergeance 

- dispersal routes out of AFrica

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What is a  population with more than a single allele at a locus called?

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Population is is called polymorphic at this locus

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Mutations are...

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Random 

Rare - average fequency of mutation in single locus = 0.0001

Weak evolutionary force - produces small change in gene frequency short term

Adaptation - main source genetic variation, allows operation of natural selction 

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What genetic material is only inherited maternally?

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mtDNA


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Define population genetics

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Population genetics is the science of describing, modelling and explaining changes in allele frequencies within and among populations


This is done by the extensive use of mathematical models

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What are the assumptions of the Hardy-Weinberg theorem

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1. Organisms are diploid

2. Only sexual reproduction

3. Non-overlapping generations

4. Random mating

5. Infinitely large population

6. Allele frequencies sex independent

7. No migration, mutation or selection

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How does migration effect genotype frequencies?

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input from other population will change allele frequencies

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Definition of a gene

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a part of a chromosome coding for a product – either a protein or a RNA

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Beispielhafte Karteikarten für deinen Genetics Kurs an der Cardiff University - von Kommilitonen auf StudySmarter erstellt!

Q:

Out of Africa model 

A:

assumes archaic homo in different places in the world was replaced by Homo sapians from Africa

Q:

when is genetic variability at its lowest


A:

when only single allele & all individuals homozygotes

Q:

What was chedderman?

A:

The remains of a mesolithic hunter-gather found in chedder gorge

Q:

How does not having only sexual reproduction change the genoype frequencies?

A:

selfing or asexual reproduction will increase number of homozygotes

Q:

What eveidence does mtDNA and the Y chromosome give for the out of Africa model?


A:

show that:

- oldest lineages are in Africa

- rest of the world is derived lineages

- pogressive signals of divergeance 

- dispersal routes out of AFrica

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Q:

What is a  population with more than a single allele at a locus called?

A:

Population is is called polymorphic at this locus

Q:

Mutations are...

A:

Random 

Rare - average fequency of mutation in single locus = 0.0001

Weak evolutionary force - produces small change in gene frequency short term

Adaptation - main source genetic variation, allows operation of natural selction 

Q:

What genetic material is only inherited maternally?

A:

mtDNA


Q:

Define population genetics

A:

Population genetics is the science of describing, modelling and explaining changes in allele frequencies within and among populations


This is done by the extensive use of mathematical models

Q:

What are the assumptions of the Hardy-Weinberg theorem

A:

1. Organisms are diploid

2. Only sexual reproduction

3. Non-overlapping generations

4. Random mating

5. Infinitely large population

6. Allele frequencies sex independent

7. No migration, mutation or selection

Q:

How does migration effect genotype frequencies?

A:

input from other population will change allele frequencies

Q:

Definition of a gene

A:

a part of a chromosome coding for a product – either a protein or a RNA

Genetics

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