Apomixis: Asexual Reproduction Without Meiosis
The process described, where sexual reproduction is replaced by a method that bypasses both meiosis (reductional cell division) and syngamy (fusion of gametes), is termed Apomixis.
Understanding Apomixis
Apomixis is essentially asexual reproduction in plants that mimics the outcome of sexual reproduction, specifically the production of seeds. Key features include:
- Bypasses meiosis and fertilization.
- The resulting offspring are genetically identical to the parent plant.
- It allows for the propagation of desirable traits reliably.
Distinguishing Other Terms
It is important to differentiate apomixis from related terms:
- Agamospermy: This is seed formation without fertilization. It is often considered a type of apomixis.
- Parthenocarpy: Refers to the development of fruit from the ovary without fertilization. It does not involve seed formation.
- Parthenogenesis: This is the development of an embryo from an unfertilized egg cell or gamete. While it involves gametes, it differs from apomixis in its typical scope and context (often refers to animal reproduction or specific plant cell development, whereas apomixis focuses on seed production mimicking sexual reproduction).
Therefore, Apomixis is the most accurate term for the substitution of sexual reproduction involving seed production without meiosis and syngamy.
Similar Questions
This curve is drawn for a given mass of a gas. This curve represents an:
- Number of degree of Freedom of a molecule of Oxygen (O$_2$) gas is:
- The condition for dark fringes in single slit diffraction is given by
$\sin\theta = \frac{m\lambda}{a}$
in case, light from the entire slit arrives at point of observation in phase, for a bright band $\sin\theta$ is equal to: - If '$\omega$' is the angler frequency and 'k' is the wave number represents a photon of energy E and momentum 'P' through the wave function E$_y$ (x, t) = A $\sin$ (kx$-\omega$t)
Which of the following relation is true: $\vec{B}$ is constant, No current in the cube. Cube is moving with '$\vec{v}$' velocity. The direction of electric force on the electron inside this cube is:
- Proton is discovered by
- Electron is discovered by
- Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: Curl of electric field is zero
Reason R: Linear integral of electric filed around a closed path is evidently zero.
In the light of the above statements, choose the most appropriate answer from the options given below - Given below are two statements: one is labelled as Assertion A and the other is labelled as Reason R
Assertion A: A conductor is an equipotential
Reason R: $\nabla \cdot \vec{B} = 0$, $\vec{B}$ is magnetic field
In the light of the above statements, choose the most appropriate answer from the options given below - ________ dyes are salts of sulfonic or carboxylic acids. They are used to dye fibers with basic groups such as wool, silk and polyamides.
Important Questions from Mixed Topic (CUET PG)
- Who was the founder of Bolshevik Communist party?
- What is the key guide to statecraft in the realist tradition?
- Chronologically arrange the events in the Cold War period.
A. Berlin Wall is constructed
B. Communist China joins the UN
C. Soviet invasion of Czechoslovakia
D. Berlin Blockade
Choose the correct answer from the options given below: Morgenthau's principles of political realism are:
A. Politics is rooted in permanent and unchanging human nature which is basically self centred, self-regarding and self-interested
B. Politics is an autonomous sphere of action and cannot therefore be reduced to morals
C. International Politics is an arena of conflicting self-interests
D. The ethics of international relations is situational ethics which is very different from private morality
Choose the correct answer from the options given below:Who among the following political thinkers consider the anarchical self help system to be a compelling factor for States to maximise their relative power positions?
