Dictyosome biology (GOLGI APPARATUS) – Formation and Functions
rubabDictyosome consists of flattened membranous sacs. They look like a stack of pita bread. A cell may have several interconnected stacks. Each cisterna in a stack consists of a membrane.…
MITOCHONDRIA
Mitochondria are commonly called as power house of the cell. They provide energy transuding system. This system is used to change the food into chemical energy by oxidative phosphorylation. ATP…
PLASTIDS
The membranous bound and pigment containing bodies present in the cell are called plastids. Name plastid was first used by Schimper in 1883. Plastids are present only in plant cells…
ENDOPLASMIC RETICULUM
The word endoplasmic means "within- the cytoplasm. The word reticultun in ans "network.- The. ER consists of a network of membranous ubules and sacs called cisternae. The ER are extensive…
ULTRASTRUCTURE OF PLANT CELL
All plants are made up of cells. The cell plays a fundamental role in the understanding of botany. It also helps in the understanding of chemistry. Cell is the simplest…
OBJECTIVE & FILL IN THE BLANKS OF LINKAGE AND CROSSING OVER
Multiple Choice Questions (MCQs) I. The phenomenon in which genes are present on the same chromosomes is: (a) Cross over (b) Segregation (c) Linkage(d) assortment The linked gene does not…
SUBJECTIVE & SHORT QUESTIONS OF LINKAGE AND CROSSING OVER
SUBJECTIVE QUESTIONS What is gene linkage? Demonstrate it with examples. Write note on linkage groups. Describe crossing over. What is linkage map? How are they constructed? Explain. Give different…
DEFINITION & KEY POINTS OF LINKAGE AND CROSSING OVER
DEFINITIONS TERMS Linkage group A chromosome carries its linked genes en bloc in the form of a linkage group. Crossing over The exchange of segments between non-sister chromatids of …
DETECTION OF LINKAGE
There are different methods to detect linkages among genes. Some of these are: Detection of linkage by PD/NPD ratio The Parental generation (PD) to non-parental generation ratio gives indication about…
Construction of Linkage Maps
A linkage map is a chromosome map of a species that shows the position of its known genes or markers relative to each other, rather than as specific physical points…