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Heritability

BIO152 Lecture 12 Darwin and Natural Selection

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Biology
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Evolutionary biology
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Natural selection
evolution
Mutation
Adaptation
Common descent
Mimicry
Vestigiality
Heritability
Pesticide resistance

Lecture 12-13 BIO152 Darwin and Natural Selection L12 mimicry means similar to something else mimicry can be shape and just not behavior mimic octopus is an example, it mimics a number of poisonous sea animals shape, behavior and colour chromataphors- changes shape , not just colour but patters uniform-little or no contrast moderate- destructive- to interfere with the colour that the actuall organism is octopus is colour blind but because of chromataphors not just matching colour behind you but the texture lyer bird makes sounds that they hear in their environment **Fig 23.13 Less than 35 years Think-Pair-Share Q: Where did antibiotic resistance gene come from?

Heritability Explanation

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Biology
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Genetics
intelligence
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Heritability
Twin study
Eugenics
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heredity
G factor
Heritability of IQ
Nature versus nurture
health

Heritability appears in many texts in school. Heritability statistics rose from the work of Galton. It is a group statistic that makes no sense to apply to an individual. Heritability is the extent to which differences in the appearance of a trait across several people can be accounted for by differences in their genes. Heritability does not reflect the extent to which traits will be passed down from parent to offspring. The estimates usually come from twin studies. If IQ is very heritable, it means that individuals with the same genes have similar IQs and individuals with different genes have relatively different IQs. Problems arise when what IQ doesn?t mean is considered.

Heritability Explained

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Heritability

A researcher seeking to quantify the influence of genes or environment on a trait needs to be able to separate the effects of one factor away from that of another. This kind of research often begins with attempts to calculate the heritability of a trait. Heritability quantifies the extent to which variation among individuals in a trait is due to variation in the genes those individuals carry. In animals where breeding and environments can be controlled experimentally, heritability can be determined relatively easily. Such experiments would be unethical for human research. This problem can be overcome by finding existing populations of humans that reflect the experimental setting the researcher wishes to create.
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