Individual blastomeres were isolated from a blastula at the 4-cell stage. Each blastomere
A、Birth of one baby
B、Birth of four genetically different babies
C、Birth of four genetically identical babies
D、Birth of four grotesquely deformed babies
A、Birth of one baby
B、Birth of four genetically different babies
C、Birth of four genetically identical babies
D、Birth of four grotesquely deformed babies
A、combination
B、collective
C、collection
D、collector
此题为判断题(对,错)。
A、Sperm penetration of the corona radiata
B、Formation of a female pronucleus
C、Appearance of the blasrocyst
D、Completion of cleavage
A、Epiblaslt
B、Syncytiotrophoblast
C、Hypoblast
D、Extraembryonic somatic mesoderm
A、Syncytiotrophoblast and cytotrophoblast
B、Syncyrtiotrophoblast and endometrium
C、Exocoelomic membrane and syncytiotrophoblast
D、Exocoelomic membrane and cytotrophoblast
A、diffusion
B、yolk sac nourishment
C、reverse osmosis
D、fetal capillaries
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