Chapter 2 Notes
Chapter 2 Notes H_D 101
Popular in H_D 101- Human Development Across the Lifespan
Popular in Human Development
This 2 page Class Notes was uploaded by Jessie Notetaker on Tuesday September 8, 2015. The Class Notes belongs to H_D 101 at Washington State University taught by Elizabeth Soliday in Fall 2015. Since its upload, it has received 34 views. For similar materials see H_D 101- Human Development Across the Lifespan in Human Development at Washington State University.
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Date Created: 09/08/15
Prenatal Tests 0 Designed to identify chromosomal and genetic problems in developing fetus Examples AFP low risk blood test CVS high risk taking material from surrounding fetus amniocentesis high risk taking uid from surrounding embryo ultrasound to detect neuro tube defects and abnormalities Heredity and the Environment Genotype the inherited genetic material itself Phenotype outward characteristics resulting from genes and environmental in uences Studying Heredity and Environment Kinship studies 0 Twin studies 0 Monozygotic vs dizygotic twins 0 Adoption studies Concep on Union of ovum and a sperm cell Ova 0 Released from ovarian follicle and enters fallopian tuve o In case of the egg not being fertilized ova is discharged along with blood and tissue in menstruation Sperm released in ejaculatory uid 0 Surviving sperm reached fallopian tubes 6090 minutes after ejaculation 0 Only one sperm enters the egg and locks others out Prenatal Development 0 Normal gestation period is 280 days Divided into three periods 0 Germinal stage 02 weeks Blastocyst Zygote Undifferentiated cells 0 Embryonic Stage 38 weeks Differentiation formation of major phys systems 0 Fetal stage third month through birth Finishing add fat Germinal stage 0 Period from conception to implantation Blastocyst zygote o Fluid lled ball of rapidly dividing cells 0 Cells are undifferentiated Embryonic disk 0 Two distinct layers in the inner part of the blastocyst 0 Forms a thickened mass of cells that eventually become the fetus Embryonic Stage Implantation 2 months Beginnings of essential maternal support
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