Human Reproduction (Distinguishing Factors) - MH-CET 2014

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Published on February 19, 2014

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Human Reproduction (Distinguishing Factors) - MH-CET 2014 by ednexa.com

Human Reproduction (Distinguishing Factors) MH-CET 2014 1. Blastula and Gastrula. Ans: Blastula 1. Blastula has a blastocoel. 2. Blastula is produced by the process of blastulation. 3. Blastula undergoes implantation followed by gastrulation. Gastrula 1. Gastrula has a gastrocoel or archenteron. 2. Gastrula is produced by the process of gastrulation. 3. Gastrula undergoes morphogenesis and then forms germ layers.

2. Spermatogenesis and Oogenesis. Ans: Spermatogenesis Oogenesis 1. Spermatogenesis takes place in 1. Oogenesis takes place in ovaries in testis in mature and fertile males. mature and fertile females. 2. From one Spermatogonium four 2. From one oogonium one haploid haploid sperms are formed during ovum and a polar body is formed Spermatogenesis. during oogenesis. 3. Spermatid developed undergoes 3. There is no such process of metamorphosis in the process of metamorphosis in oogenesis Spermatogenesis. 4. Ootid development does not take 4. Spermatid development takes place place during oogenesis. It develops which later becomes a functional sperm. only after fertilization. 5. Oogonia, primary and secondary 5. Spermatogonia,primary and oocytes are the stages formed during secondary spermatocytes and oogenesis. Ootid formation occurs spermatid are the stages of sperms only after fertilization. formed during spermatogenesis.

3. Morula and Blastula. Ans: Morula Blastula 1. Morula is the embryonic stage 1. Blastula is the embryonic stage formed after the completion of formed after the completion of cleavage. blastulation. 2. Morula is formed 4 to 6 days after 2. Blastula is formed 4 to 6 days after the fertilization. the fertilization. 3. Morula consists of 16 cells. 3. Blastula consists of more than 64 4. Morula is solid ball of cells. 5. Morula stage is passed in fallopian cells. 4. Blastula is a hollow ball of cells. tube, once it reaches uterus, it starts 5. Blastula after reaching the uterus is developing into the next stage. implanted on the wall of uterus. 6. Morula does not have any dis- 6. Blastula has a blastocoel, tinction of its inner cell structure. trophoblast and inner cell mass.

4. Zona pellucida and Corona radiata. Ans: Zone pellucida Corona radiata. 1. Zona pellucida is inner, thin and 1. Corona radiata is the outer thick transparent layer surrounding the layer surrounding the secondary secondary oocyte. oocyte. 2. Zona pellucida is a non – cellular 2. Corona radiata is a cellular layer. layer. 3. Corona radiata is formed by 3. Zona pellucida is secreted by the follicular cells which are glued ovum itself. together by hyaluronic acid. 4. Zona pellucida is retained for more 4. Corona radiata is retained till the time after fertilization till the ovum gets implanted in the uterus. ovum gets fertilized. 5. Corona radiata is digested by 5. Zona pellucida is digested by zona hyaluronidase enzyme at the time of lysine or acrosin at the time of fertilization. fertilization. Keep on visiting www.ednexa.com for more study material about MH-CET 2014. - Team Ednexa

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