Module 6 - 21:04 Objective 6-3 Humans have 46 chromosomes,...

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21:04 Objective 6-3 Humans have 46 chromosomes, 23 from each parent We share 96% of our DNA sequencing with chimpanzees Person-to-person variations give clues as to why some people have severe diseases/healthy, why some people are short/tall, why some people are happy/depressed Complex human traits (intelligence, happiness, aggressiveness) are influenced by gene complexes - groups of genes Objective 6-4 Identical twins o Develop from a single fertilized egg that splits into two o Genetically identical organisms Fraternal twins o Develop from separate fertilized eggs o Are genetically no more similar than brothers and sisters Identical twins are much more similar than fraternal twins on outgoingness and emotional instability (extraversion and neuroticism) Identical twins whose parents treated them alike were not psychologically more alike than identical twins who were treated less similarly Identical twins who are separated at birth are virtually alike- personality wise o Similarities in abilities, attitudes, interests, tastes, and fears Objective 6-5 Adopted children’s personality traits (outgoingness, agreeableness, etc…) are more similar to their biological parents than their adoptive parents o Environmental factors shared by a family’s children have virtually no impact on their personalities o Two adopted children reared in the same home are no more likely to share personality traits Although personality may be influenced by genetic factors, adoptive parents influence
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Module 6 - 21:04 Objective 6-3 Humans have 46 chromosomes,...

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