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Question
What would be the correct sequence of events inside the human female reproductive system?
What would be the correct sequence of events inside the human female reproductive system?
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Solution
The correct option is A Ovulation → Fertilisation → Zygote formation → Blastocyst
Rapid secretion of LH from anterior pituitary causes the rupture of the mature Graafian follicle and the release of secondary oocyte. This is called ovulation.
The secondary oocyte on coming in contact with the sperm in the ampulla of fallopian tube completes meiosis II and forms into haploid ovum.
Fertilisation occurs in the fallopian tube wherein the nucleus of the sperm fuses with the nucleus of ovum and it results in the formation of diploid zygote.
This single celled zygote undergoes mitotic divisions called cleavage as it moves through the isthmus of the oviduct towards the uterus.
Zygote forms daughter cells called blastomeres.
The embryo with 8-16 blastomeres is called morula.
Morula transforms into blastocyst which gets implanted in the uterus.
Rapid secretion of LH from anterior pituitary causes the rupture of the mature Graafian follicle and the release of secondary oocyte. This is called ovulation.
The secondary oocyte on coming in contact with the sperm in the ampulla of fallopian tube completes meiosis II and forms into haploid ovum.
Fertilisation occurs in the fallopian tube wherein the nucleus of the sperm fuses with the nucleus of ovum and it results in the formation of diploid zygote.
This single celled zygote undergoes mitotic divisions called cleavage as it moves through the isthmus of the oviduct towards the uterus.
Zygote forms daughter cells called blastomeres.
The embryo with 8-16 blastomeres is called morula.
Morula transforms into blastocyst which gets implanted in the uterus.
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