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Chp 3 (Gene Expression (Phenotype (observable exppression of genetic…
Chp 3
Gene Expression
Phenotype
observable exppression of genetic makeup
Product of the genotype
Multifactorial Transmission
Experience modifies the expression of a genotype
Genotype
Actual genetic makeup or allele combination
Prenatal Development
Gestation
Period between conception and birth, between 37& 41 weeks
Gestational Age
Date from the 1st day of expectant mother's last menstrual cycle
Stages of Prenatal Development
Embryonic(2 to 8 weeks)
Characteristic
Organ/body system
Digestive
Nervous
Respiratory
Fetal( 8 weeks to birth)
Finishing touches- toenails, eyelids
Appearance of bone
Organ and body become more complex
Germinal (conception to 2 weeks)