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psych U3M14
genetics
Question | Answer |
---|---|
genetics | The study of heerdity |
Human genome | the instructions for making a human; consists of all genetic material in the chromosomes. |
molecular genetics | field of biology that studies the molecular function of genes |
polygenic inheritance | single gene contributes to more than one trait |
identical twins | twins who develop from a single fertilized egg that split in two, creating 2 genetically identical organisms |
fraternal twins | twins who develop from separate fertilized eggs. Not as close as identical twins, but they share a fetal environment. |
heriability | The extent to which variation among individuals comes from genes. |
down syndrome | break in the 21st chromosome; causes mental retardation, physical deformities |
Huntington's chorea | degeneration of basil ganglia; muscle impairment after age 40 |
epigenetics | the study of environmental influences of gene expression that occur without a DNA change (external influence rather than internal) |
what are the three types of studies used in human behavior genetics? | family studies, adoption studies, identical twins |
Hindbrain | Heart rate and blood pressure |
midbrain | vision and hearing regulation (eyes and ears in middleish part of head) |
forebrain | regulation of emotion "it's all in your (FORE)HEAD" |
progesterone | produced in ovaries; prepares body for pregnancy |
kinship studies | aims to determine role that heredity and environment play in determining a trait |
what causes differences in identical twins? | environmental factors (external) |