IAV
Incest Avoidance
Class: IV - Unknown or Disputed
EPA Total Score: 1 /100
Bittles, A.H., & Neel, J.V. (1994). The costs of human inbreeding and their implications for variations at the DNA level. Nature Genetics, 8, 117-121.
Abstract: An analysis of the world literature on the children of first cousin marriages reveals that the depression of survival in offspring followed from birth (including late miscarriages; at about six months gestation or later) to a median age of 10 years is constant (4.4% plusminus 4.6) across a wide range of values for population prereproductive mortality. There is thus no evidence for the action of conditional lethals. On the basis of these data, it is calculated that the average human is heterozygous for only 1.4 lethal equivalents capable of acting over this portion of the life cycle. The implications of these results are discussed in the context of genetic counseling, and the biomedical significance of variation in DNA.
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Supporting Evidence
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No one has (yet) rated this source as containing any supporting Psychological evidence for this EPA.
10/100
Submitted by DJGlass
No one has (yet) rated this source as containing any supporting Physiological evidence for this EPA.
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No one has (yet) rated this source as containing any supporting Genetic evidence for this EPA.
No one has (yet) rated this source as containing any supporting Phylogenetic evidence for this EPA.
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Supporting Evidence is evidence that suggests that this trait is an Evolved Psychological Adaptation (EPA) - i.e., that it has been shaped by natural selection to solve a particular adaptive problem.
Challenging Evidence
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0/100
Submitted by DJGlass
No one has (yet) rated this source as containing any challenging Physiological evidence for this EPA.
No one has (yet) rated this source as containing any challenging Cross-Cultural evidence for this EPA.
No one has (yet) rated this source as containing any challenging Genetic evidence for this EPA.
No one has (yet) rated this source as containing any challenging Phylogenetic evidence for this EPA.
No one has (yet) rated this source as containing any challenging Hunter-Gatherer evidence for this EPA.
Challenging Evidence is evidence that suggests that this trait is not an EPA - e.g., that it is a product of cultural learning or genetic drift, or maybe it does not exist at all. However over each line of evidence for a description.