Zygote: The Fertilised Egg Cell
The initial stage following the fusion of a male gamete (sperm) and a female gamete (egg) results in a single, fertilised cell. This first diploid cell marks the beginning of a new organism's development.
Defining Key Developmental Terms
Let's clarify the terms provided:
- Zygote: The immediate product of fertilization; a single-celled, fertilised egg.
- Embryo: A stage following the zygote, characterised by rapid cell division (cleavage) and differentiation, forming multiple cells and tissues.
- Foetus: A later developmental stage, typically after the embryonic period, where the organism has a more recognisably developed form.
- Blastocyst: An early-stage embryo consisting of about 100-200 cells, forming a hollow ball before implantation.
Identifying the Correct Term
The question specifically asks for the name of a "single-celled fertilised egg". Based on the definitions:
- The zygote perfectly matches the description of a single-celled fertilised egg.
- Embryo, foetus, and blastocyst represent later, multicellular stages of development.
Therefore, the correct term is zygote.
Similar Questions
_____________ are known as the powerhouse of the cell.
- Which of the following are present only in plant cells?
- Cytoplasm is a jelly-like fluid that is present between:
- Who coined the term 'protoplasm'?
- Diffusion is a process by which:
- A jelly-like substance between the nucleus and the cell membrane is called:
- The energy currency of the cell is called as :
- Which is the outermost covering of the cell that separates the contents of the cell from its external environment?
- Which of the following organelles is called suicidal bags of the cell?
- Which of the following statements is FALSE?
Important Questions from Cell
The full form of DNA is:
________ is called ‘the power house of the cell’.
A Eukaryotic cell has membrane bound organelles, including a nucleus, which allow cellular processes to be carried out in _________
Which of the following is a unicellular organism?
What is the name of the first mammal clone (sheep)?
