Early Embryonic Cleavage Division — NEET Biology
📚 Practice Concept📖 NCERT Source
The mitotic division starts as the zygote moves through the isthmus of the oviduct called cleavage towards the uterus and forms 2, 4, 8, 16 daughter cells called blastomeres. The embryo with 8 to 16
🖼️Related NCERT figure: Diagram showing the transport of ovum, fertilisation and passage of growing embryo through fallopian tube. Shows various stages: (a) ovum with corona radiata, (b) fertilisation with sperm entry, (c) 2-cell stage, (d) 4-cell stage, (e) morula stage, (f) early blastocyst, (g) blastocyst. Also shows the female reproductive tract with labeled parts A through H, and indicates blastocyst implantation. (Figure 2.11 Transport of ovum, fertilisation and passage of growing embryo through fallopian tube)
Practice This Concept
QuestionPractice Question
Arrange the following events of human reproduction and embryonic development in the correct chronological sequence: (A) Differentiation of inner cell mass into germ layers (B) Formation of zygote (C) Blastocyst formation and its attachment to the uterine wall (D) Appearance of limbs and digits (E) Cleavage divisions leading to morula (F) Formation of chorionic villi from trophoblast
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