During interphase, the chromosomes are not visible using a light microscope. Why would this be important for a cell? What is the significance of meiosis in terms of the genetic content of the cells produced? How do chromatin and chromosomes compare to one another?
What part of the sperm cell contains chromosomes? What part of a sperm cell contains chromosomes? How many chromosomes are in human sex cells? What are autosomes cells? What is a diploid cell? Do somatic cells produce diploid cells?
Through microscopic techniques, the concentration of chromosomes (in the nucleus or the nucleoids) causes parts of the cell to have a dense, dark appearance which represents the regions of the cell that contains DNA material. In organisms with several chromosomes (e.g. human beings have 23 pa...
This substance contains the genetic in- structions for the construction and functioning of all cells and higher or- ganisms. The segments of the DNA which contain this genetic informa- tion are called genes. The genes are organized within long structures called chromosomes. We can liken DNA to...
Contains all the 23 chromosomes of the sperm cell, that is, half the genetic information of the future embrion. This is the only part of the sperm cell that enters into the egg cell. As such it is the most important part of the spermatozoon. Its purpose is to fuse with the nucleus of...
A system that exhibits bistable behaviour has two extreme states that are stable, whereas intermediate states are unstable. Thus, the system can switch between these two stable states. Polycomb repressive complex 1 (PRC1). In flies, PRC1 contains Polycomb (Pc), Posterior Sex comb (Psc), Poly...
Genes are contained in chromosomes. These in the cell nucleus. A single chromosome contains hundreds to thousands of genes. Every normal human cell comprises 23 pairs of chromosomes that mean a total of 46 chromosomes. A trait is any gene-determined characteristic. It is often...
What is the role of the nucleus in cell division? The Nucleus: In eukaryotic cells, the nucleus holds the DNA. DNA is arranged in long strands, each being called a chromosome. The normal human nucleus has 46 chromosomes. These chromosomes are identical in each cell, thanks to the process ...
Being thicker than the primary wall, the secondary wall also contains most of the cellulose and thus the majority of carbohydrates with regards to biomass. For this reason, it's not only a component of wood but also nutrition for various organisms. *...
Each sex chromosome is composed of two pseudoautosomal regions (PAR1 and PAR2), which are conserved homologous sequences on the X and Y chromosomes, in addition to a sex chromosome-specific region which contains a greatly increased amount of genetic material on the X chromosome relative to the...