Diploidy and haploidy, Biology

Diploidy and Haploidy :: In the chromosomal complement  given species  not all the  chromosomes are different  from each other .In fact these  are in pairs ,i.e.  every  two chromosomes of the  karyotype  are similar  in shapes  size and  structure or say  are homologous, Obviously  the chromosomes   of one pairs  are different from  those of every  other pair. This  means  that the karyotype in fact  comprises two  similar sets of chromosomes, Hence it  is called diploid )2x or 2n,)

In sexual reproduction ,union of two  different  sex cells  or gametes  (male gamete or sperm cell and  female gamete or ovum) occur  to form a single diploid  cell called  zygote. From  the zygote, all body  cells  of a new  individual  arise by  repeated   mitotic divisions. Thus the karyotypic diploid chromosomal  complement  is transmitted  to all  body  cells. However  to prevent   multiplication  of the diploid  complement the sex  cells must contain  only half  the number  or say a single  set or chromosomes .This gametic chromosomal complement is thus, haploid (x or n) and  called genome, in contrast  to the  karyotype  of diploid  somatic cells, Obviously  of the  two sets  of chromosomal in a karyotype in every  individual, one is originally  obtained from male and the  other female parents.

 

Posted Date: 10/4/2012 2:45:04 AM | Location : United States







Related Discussions:- Diploidy and haploidy, Assignment Help, Ask Question on Diploidy and haploidy, Get Answer, Expert's Help, Diploidy and haploidy Discussions

Write discussion on Diploidy and haploidy
Your posts are moderated
Related Questions

Enema Enema may be given for the purpose of cleansing, for therapeutic purpose; to relieve intra-cranial pressure, abdominal distension, intusssception and for diagnostic p

Define Clinical Features and Medical Complications for bulimia? Unlike, anorexia nervosa, in bulimia you will find that symptoms are more difficult to detect because patients a

Define Body Mass Index (BMI)? Weight for height as a marker of nutritional status has the advantage that it is independent of other factors that affect foetal outcome such as m

What is a Cell? The body of every living being is made up a living matter or bio matter. In the organisms these matters occur only in the form of minute membrane bound unit lum

when does it started?

Q. After the fact that it is based on information from mRNA what is the process of protein synthesis called? Protein synthesis is called translation of genetic information into

Tuberculosis Tuberculosis is caused by a Bacillus-mycobacterium tuberculosis, a gram- positive and acid-fast organism. It is communicable disease. Mode of Transmissio

Direct demonstration of the causative agent by electron microscopy (EM): Where facilities for electron microscopy are available and a viral disease is suspected, presence o

Explain The cardiovascular type of infantile beriberi? It manifests itself in babies between the ages of 2 and 4 months. The onset is acute with classical signs and symptoms of