Number of chromosomes, Biology

NUMBER

Benden and Boveri first indicated that number of Chromosomes is definite in each organism.

(1) Haploid (n) - One set of Chromosomes. i.e. one Chromosome of each type.

(2) Diploid (2n) - Two sets of chromosomes i.e. two Chromosomes of each type.

Two chromosomes of each type form pairs during fertilisation and meiosis. Such pairs called homologous pairs.

One Chromosome of a pair is received from male parent and other from the female parent (such pairing first occurs at the time of fertilisation)

Mucor haemelis  2n = 2

Haplopappus gracilis 2n = 4. Haplopappus is a plant of family compositae.

Ophioglossum reticulatum 2n = 1262

Ascaris megalocephala 2n = 2

Aulocantha (Radiolarian protozoa) 2n = 1600

Posted Date: 10/8/2012 1:24:22 AM | Location : United States







Related Discussions:- Number of chromosomes, Assignment Help, Ask Question on Number of chromosomes, Get Answer, Expert's Help, Number of chromosomes Discussions

Write discussion on Number of chromosomes
Your posts are moderated
Related Questions
True cyst: cyst that is completely lined by epithelial tissues.All the lesions are far away without communication with endodontic access or endodontic cavity or periapical

What do you understand by tegument? Outer covering of parasitic flatworms, including tapeworms and flukes, comprising a syncytial outer layer of cytoplasm connected to cell bod

Define Steps for prevention strategies of Obesity? The first and most important step for the rapidly progressing developing countries is to collect and organize data from vario

Migration - Population Dispersal Dispersal is affected by the presence or absence of the barrier and vagility which means inherent power of movement also called dispersal powe

what is the difference between fair skin and dark skin?

What are the main respective constituents of cell walls in bacteria, protists, fungi and plants? In bacteria the cell wall is made of peptidoglycans; between protists algae hav

Explain about the Food Science and Technology? Food Science and Technology are so inextricably linked that usually these are treated as one field of study. While Food Science d

Radial cleavage - Metazoa Radial cleavage produces tiers or layers of cells one on top of another. Radial cleavage is also said to be indeterminate or regulative because each

Recovery of tar: the coke oven gas coming out from ovens is passed through a tower where liquid ammonia is sprayed. The tar and dust are removed and then recovered. Recover of

Imagine a population evolving by genetic drift in which the frequency of allele K is 0.65. What is the probability that at some point in the future allele K will drift to a frequen