Fertilisation and Implantation
Fertilisation and Implantation: Overview
This Topic covers sub-topics such as Ectopic Pregnancies, Implantation, Blastocyst, Fertilization in Humans, Morula, Trophoblast, Capacitation, Blastomeres, Cortical Reaction and, Cleavage of Zygote
Important Questions on Fertilisation and Implantation
What is ectopic pregnancy?
Mention the name of the cells formed after the cleavage of the zygote.
The metabolic activity (s) that takes place after the entry of sperms into the ovum are/is
A blastocyst is a hollow ball, surrounded by a single layer of cells enclosing a cavity called the blastocoel or the cleavage cavity.
Which process of embryonic development is called fractionating process, whether it is cleavage or gastrulation?
Identify the part labelled 'A' from the figure given below.
Embryonic membranes are formed from a layer of cells called _____ of blastula.
In human being, the type of cleavage is
Mention whether 'Mitotic or Meiotic' division takes place during the cleavage of zygote.
How many cells are present in morula stage.
Match the following and choose the correct option.
| A | Trophoblast | i | Embedding of blastocyst in the endometrium |
| B | Cleavage | ii | Group of cells that would differentiate as embryo |
| C | Inner cell mass | iii | Outer layer of blastocyst attached to the endometrium |
| D | Implantation | iv | Mitotic division of zygote |
Fill the blanks in the given statements and select the correct option.
A. The developmental stage of an animal passed in the mother's womb is called (i)
B. The outer layer of blastula is called (ii) . It does not take part in the formation of (iii)
C. (iv) is the first germ layer formed from the inner cell mass by differentiation.
Which of the following events makes zona pellucida thick and blocks its receptors for sperm binding and checks polyspermy?
Which of the following forms the outer wall of blastocyst?
The cells of Rauber are:
In human female, the blastocyst
Which of the following embryonic stages attaches to the endometrial lining of uterus for further development?
Choose the correct option with respect to the events of human reproductive system.
A. Cortical reaction
B. Capacitation
C. Spermiogenesis
D. Acrosomal reaction
Zygote undergoes cleavage while moving through the isthmus of the oviduct towards the uterus and forms daughter cells called blastomeres. The embryo with 8 to 16 blastomeres is called a ____A____which continues to divide to form____B____in uterus. The blastomeres in the ____B____are arranged into an outer layer called ____C____ and an inner group of cells called the inner cell mass.
