Lecture 2-HO

Lecture 2-HO - Lecture 2 Organisms we use to study...

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± -FDUVSF ²³ ±´±µ´±¶ -FBSOJOH HPBMT #Z UIF FOE PG DMBTT UPEBZ³ ZPV TIPVME CF BCMF UP· (JWF B HFOFSBM EFTDSJQUJPO PG XIBU EFWFMPQNFOU JT BMM BCPVU¸ %FGJOF MJGF DZDMFT³ UIF TUBHFT PG FNCSZPOJD EFWFMPQNFOU³ EFUFSNJOBUJPO BOE EJGGFSFOUJBUJPO¸ 0SHBOJTNT XF VTF UP TUVEZ EFWFMPQNFOU Metazoans 5SJQMPCMBTUT %JQMPCMBTUT w Multicellular organisms that pass through embryonic stages of development Generalizable Life Cycle w Similar stages of development for most animals: w Fertilization : Beginning of life with egg and sperm fusion, stimulates egg to begin develop w Embryogenesis: Stages of development between fertilization and hatching. a. Cleavage b. Gastrulation c. Organogenesis d. Gametogenesis e. Metamorphosis 'SPH %FWFMPQNFOU (BNFUPHFOFTJT BOE 'FSUJMJ[BUJPO ¹'SPHTº w 4FBTPOBM &WFOUT w 'FSUJMJ[BUJPO
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± Cleavage of Fertilized Egg ²'SPHT³ Gastrulation ²'SPHT³ Gastrulation w Blastomeres rearrange relative to one another w Result: formation of 3 germ layers w Ectoderm- covers outside of embryo,
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Lecture 2-HO - Lecture 2 Organisms we use to study...

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