Patterns Of Inheritance at University Of Buckingham | Flashcards & Summaries

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Explain why a person whose blood group is AB expresses both A and B antigens on the surface of their red blood cells

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A and B are codominant so both genes transcribed meaning both antigen proteins are produced

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define phenotype

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characteristics that alleles produce

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define monogenic inheritance

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where one phenotypic characteristic is controlled by a single gene

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what is genetic drift?

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change in population's alleles frequencies that occur due to chance rather than selection pressures

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In what type of environment does directional selection take place in?

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changing

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define dihybrid inheritance

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2 phenotypic characteristics are determined by 2 different genes present on two different chromosomes at the same time

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in what type of environment does stabilising selection take place in?

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non-changing

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What is stabilising selection?

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  • the process where natural selection favours average phenotype
  • selection pressures select against extreme phenotypes
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how many genes code for continuous variation?

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multiple

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What is directional selection?

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  • extreme phenotype favoured
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what is locus?

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fixed position of a gene on a chromosome, alleles of a gene are found at the same locus

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what is disruptive selection?

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2 populations are reproductively isolated and exposed to different selection pressures which drives evolution in different directions

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  • 263 Karteikarten
  • 37 Studierende
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Beispielhafte Karteikarten für deinen patterns of inheritance Kurs an der University of Buckingham - von Kommilitonen auf StudySmarter erstellt!

Q:

Explain why a person whose blood group is AB expresses both A and B antigens on the surface of their red blood cells

A:

A and B are codominant so both genes transcribed meaning both antigen proteins are produced

Q:

define phenotype

A:

characteristics that alleles produce

Q:

define monogenic inheritance

A:

where one phenotypic characteristic is controlled by a single gene

Q:

what is genetic drift?

A:

change in population's alleles frequencies that occur due to chance rather than selection pressures

Q:

In what type of environment does directional selection take place in?

A:

changing

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Q:

define dihybrid inheritance

A:

2 phenotypic characteristics are determined by 2 different genes present on two different chromosomes at the same time

Q:

in what type of environment does stabilising selection take place in?

A:

non-changing

Q:

What is stabilising selection?

A:
  • the process where natural selection favours average phenotype
  • selection pressures select against extreme phenotypes
Q:

how many genes code for continuous variation?

A:

multiple

Q:

What is directional selection?

A:
  • extreme phenotype favoured
Q:

what is locus?

A:

fixed position of a gene on a chromosome, alleles of a gene are found at the same locus

Q:

what is disruptive selection?

A:

2 populations are reproductively isolated and exposed to different selection pressures which drives evolution in different directions

patterns of inheritance

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