What are some problems with researching behavioural genetics (5)?
Difficulty in defining and quantifying behaviour, environmental influences make research more complex, inter/ intra variation, many genes are involved, different genes function in different tissues at different times.
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What are the main ideas of heredity (3)?
Continuity (blending inheritance, resemblance to both parents, malleable), intact transmission (particulate inheritance, genes), discontinuity (non-resemblance of traits, mutations).
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What contributes to the expression or production of a phenotype?
Genes.
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What are proteins?
Made up of amino acid sequences. Can have structural or transport/ storage functions.
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What can expression of a gene influence (4)?
Expression of other genes, activity of the cell/ other tissues/ organs, developmental processes, activity of the brain/ muscles/ messenger systems.
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What can quantitative traits be?
Morphological, physiological or behavioural.
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What is norm of reaction?
The pattern of phenotypic expression of a single genotypes across a range of environments.
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What is phenotypic variance based on?
Additive effects of genetic variance and environmental variance.
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