Pls choose correct option
Dear student,
1. 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 16blastomeres is called a morula. The morula continues to
divide and transforms into blastocysts 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. Hence option A is correct because cell division to form blastocysts takes place before the implantation of fertilized egg in uterus.
Thanks and regards
1. 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 16blastomeres is called a morula. The morula continues to
divide and transforms into blastocysts 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. Hence option A is correct because cell division to form blastocysts takes place before the implantation of fertilized egg in uterus.
Thanks and regards