PSYO 2160 Lecture Notes - Lecture 8: Green Sea Turtle, Pleiotropy, Phenylketonuria
24 May 2018
School
Department
Course
Professor
Molecular Genetics and Development
Behavioral genetics
- Study of heritability of a behavior.
- How genetics influence of behavior.
Important note
- few genes are dedicated to behavioral function.
- Genes influence the expression of behavior pattern.
Drosophila foraging gene
Kent et al. 2009
- rover vs. sitter larvae.
- Differ in foraging behavior.
- Difference due to 1 gene.
- Rover/sitter foraging gene encondes an essential protein, important for intracellular
signaling (PKG).
- Rovers have higher PKG activity.
Ruff birds
- S allele (dominant) = satellite male.
- S allele (recessive) = homozygous results in independent male.
- Behavioral dimorphism: when a behaviour and a trait is ‘controlled’ by a gene.
Pleiotropy: 1 gene influences 2 or more seemingly independent (unrelated) phenotype traits.
Ex: phenylketonuria.
Epigenetics
- the study of heritability of biological mechanisms that turn genes on and off.
find more resources at oneclass.com
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Document Summary
Important note few genes are dedicated to behavioral function. Genes influence the expression of behavior pattern. Rover/sitter foraging gene encondes an essential protein, important for intracellular signaling (pkg). S allele (recessive) = homozygous results in independent male. Behavioral dimorphism: when a behaviour and a trait is controlled" by a gene. Pleiotropy: 1 gene influences 2 or more seemingly independent (unrelated) phenotype traits. Epigenetics the study of heritability of biological mechanisms that turn genes on and off. Epigenetics do not changes the underlying dna sequence. Ex (rats): it was found that stress in rats can only be activated with an inattentive mother, even though the pups had the gene for stress. Also the other way around, pups without the gene could develop up, being raised by an inattentive mother. An egg developing above 29 degrees = female. An egg developing below 29 degrees = male.
