Kinetochores refer to special proteins found on the centromeres that are responsible for the movement of the chromosomes. The centromere represents the constricted point on the chromosome where two sister chromatids are attached to each other. Chromosome structure....
Structure of Cell Membrane Structurally, it consists of a phospholipid bilayer along with two types of proteins viz. embedded proteins and peripheral proteins that function in providing shape and allowing the movement of particles in and out of the cell. The most abundant lipid which is present in...
Chromosomes:they are also known as the chromatids. They are found in the cell nucleus of almost all cells. They have 6 long strands of DNA which divide into 46 separate molecules which pair up into two, made of 23 molecules per chromosome. To form a functional DNA unit, it is combined ...
The penis and the clitoris are related in structure to one another. In fact, they actually originate from the same developmental tissue (4). At eight weeks of fetal development, the Y chromosome on male DNA will activate the differentiation of the genital tissue to develop into a penis, inst...
2. Down Syndrome: A genetic disorder caused when abnormal cell division results in an extra full or partial copy of chromosome 21. This extra genetic material causes developmental changes and physical features of Down syndrome[^10^]. 3. Fragile X Syndrome: An X-linked genetic condition that re...
The genome of E. coli and other prokaryotes consists of a single, long, circular DNA molecule supercoiled and packed into the “nuclear” region of the cell. The E. coli chromosome is about 1100 nm long and appears to contain at least three separate regions coding for rRNA. Eac...
centromere and chromatids in cell divisionDuring the first stages of cell division, the recognizable double-stranded chromosome is formed by two tightly coiled DNA strands (chromatids) joined at a point called the centromere. During the middle stage of cell division, the centromere duplicates, and...
Abnormal Chromosome Number & Structure Klinefelter and XYY Syndrome: Types of Sex Chromosome Aneuploidy Operon Definition, Function & Examples RNA to Amino Acids | Genetic Code Translation, Definition & Codon Create an account to start this course today Used by over 30 million students worldwide ...
DNA molecules can be thousands of bases (or more properly,base pairs) long. In fact, a humanchromosomeis nothing more than a single very long strand of DNA coupled with a good deal of protein. RNA molecules of all types, on the other hand, tend to be comparatively small. ...
Throughout the book much emphasis is placed on work carried out with microorganisms the life cycles of Chlamdoommoonnaass aanndd JJ*'IIeeuurroossppoorraa aarree mmaadde use of to explain recombination and chromosome mapping, and the genetics of bacteria and bacteriophage are dealt with in ...