Immature Embryo
In certain plants the seeds are shed before the embryo is mature. So the seed undergoes dormancy to allow the embryo to devel..
Embryo Culture
Embryo mortality and seed failure associated with embryo development are most common reasons for failure of interspecific hybridization due to incompatability. In such instances, fertilization and zygote formation may not suffer but embryo development does not ta..
Embryo Formation
The fertilised egg undergoes a regular sequence of divisions to form the embryo. The oospore divides to form a suspensor or basal cell and a terminal embryo cell. The basal cell is towards the micropyle and the terminal cell is towards the chalaza. The basal cell divides repeat..
The fertilised egg undergoes a regular sequence of divisions to form the embryo. The oospore divides to form a suspensor or basal cell and a terminal embryo cell. The basal cell is towards the micropyle and the terminal cell is towards the chalaza. The basal cell divides repeat..Female Reproductive System in Human
Female Reproductive System in Human - The human female reproductive system performs the following functions: a) Formation of eggs b) Reception of sperms during copulation c) Providing a conducive environment for fertilisation d) Providing shelter and nourishment to the growing h..
Female Reproductive System in Human - The human female reproductive system performs the following functions: a) Formation of eggs b) Reception of sperms during copulation c) Providing a conducive environment for fertilisation d) Providing shelter and nourishment to the growing h..Development of Embryo Axis into Seedling
As the food is translocated, the cells of the embryo become active and grow in size and divide rapidly to form the seedling. Based on the behaviour of cotyledons, germination is of two types i) Epigeal Germination ii) Hypogeal Germinati..
ALGAE (No embryo stage during development)
1. RHODOPHYTA (Red Algae) 2. PHAEOPHYTA (Brown Algae) 3. CHLOROPHYTA (Green Alga..
Evidences from Embryology
Embryology is another branch, which offers some indirect evidences for evolution. An embryologist by name Haeckel, proposed the idea 'ontogeny recapitulates phylogeny' which means that the evolutionary history (phylogeny) of a species is indicated by the developmental stages (ontogeny) that it pas..
Cloning of Organisms
fig. 25.8 Worlds first cloned cat called CC (Calico Cat) seen with her surrogate mother Allie Ian Wilmut and co-workers produced in 1997, the worlds first clone of an adult sheep at Edinburgh's Roslin institute. The clone of a sheep was created from a single cell taken from the udder of an adult sh..
Cleavage (Segmentation)
Cleavage is an unique embryological process which transforms the single fertilised egg cell into a sphere of closely aggregated multitude of cells. Immediately after fertilisation the fertilised ovum (egg cell) undergoes a series of cell divisions. These divisions are called cleavage divisions, whi..
Cleavage is an unique embryological process which transforms the single fertilised egg cell into a sphere of closely aggregated multitude of cells. Immediately after fertilisation the fertilised ovum (egg cell) undergoes a series of cell divisions. These divisions are called cleavage divisions, whi..Designer Plants
Designer Plants - Many years ago, Frederick Steward and his co-workers cultured cells from carrot plants and induced some of them to develop into small embryos. Some of these embryos grew into whole plants. Today, researchers routinely regenerate crops, plants and many other pla..
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