Human Embryology - 1 QuicKEY

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What is Biopera QuicKEY for NEET ? Biopera QuicKEY is an original memory enhancing technique developed by Siddharth Sanghvi Sir. You have to read below given paragraph or you have to observe given picture, then, you have to attempt given questions in terms of True or False or MCQs.This technique will definetly improve your analytical ability and will improve your power to memorize concepts. After completion of QuicKEY, you will get solutions instantly. You can review them for your Betterment. You can also compare your performance with others by viewing previous responses. By doing this, you can learn which question created problems for most of the candidates, and where you alone are incorrect.

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Read the paragraph and give the answers of following Questions. 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 blastomeres is called a morula . The morula continues to divide and transforms into blastocyst as it moves further into the uterus. The blastomeres in the blastocyst are arranged into an outer layer called trophoblast and an inner group of cells attached to trophoblast called the inner cell mass. The trophoblast layer then gets attached to the endometrium and the inner cell mass gets differentiated as the embryo. After attachment, the uterine cells divide rapidly and covers the blastocyst. As a result, the blastocyst becomes embedded in the endometrium of the uterus This is called implantation and it leads to pregnancy.

The embryo with 8 to 16 blastomeres is called a morula.

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The morula continues to divide and transforms into blastocyst into the fallopian tube. The blastomeres in the blastocyst are arranged into an outer layer called trophoblast and an inner group of cells attached to trophoblast called the inner cell mass.

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Blastocyst have fluid filled blastocoel

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AIPMT-2010- Which one of the following statements about morula in humans is correct?

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(a) It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA.

(b) It has far less cytoplasm as well as less DNA than in an uncleaved zygote.

(d) It has more cytoplasm and more DNA than an uncleaved zygote.

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AIPMT-2010-Mains : In human female, the blastocyst

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(a) forms placenta even before implantation

(b) gets implanted into uterus 3 days after ovulation

(d) gets implanted in endometrium by the trophoblast cells.

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