Number of chromosomes, Biology

Assignment Help:

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


Related Discussions:- Number of chromosomes

Explain the structural and functional changes in cancer , Identify and brie...

Identify and briefly explain the structural and functional changes that occur in the large bowel when colorectal cancer develops.

Limb field, Limb Field By several marking and transplantation methods...

Limb Field By several marking and transplantation methods it is feasible to identify in early embryos the specific areas of groups of cells that ultimately make different org

Explain protein deficiencies in nutritional care, Explain Protein Deficienc...

Explain Protein Deficiencies in Nutritional Care? A depleted amino acid pool leads to poor wound healing (dehiscence), delayed healing of fractures, anaemia, depressed pulmonar

Dietetic foods for diabetes, Dietetic Foods for diabetes: With advances...

Dietetic Foods for diabetes: With advances in food technology, foods for special use by diabetics are now available in the global market, they are emerging in India also. These

Define about the composition of body weight, Define about the Composition o...

Define about the Composition of Body Weight? You might have read in previous units that our body weight is composed of muscle bone and fat. Segregating these components of body

Disability adjusted life years (dalys), Disability Adjusted Life Years (DAL...

Disability Adjusted Life Years (DALYs) DALYs is a measure for the overall ‘burden of disease’. Originally developed by the World Health Organization (WHO), it is being increas

Surgical management, Surgical Management: Surgical management consists...

Surgical Management: Surgical management consists of  primary repair which involves end to end anastomosis with excision of  the fistula and delayed and staged surgery. When t

What are holandric genes, What are holandric genes? The Holandric genes...

What are holandric genes? The Holandric genes are genes situated in the nonhomologous region of the Y chromosome. Holandric genes condition phenotypes that emerge only in men s

Intravenous route, Intravenous Route This route of administering drug...

Intravenous Route This route of administering drugs is becoming more popular in the paediatric practice. Purpose of this Route When rapid action is required.

Excretion., organisms and their excretory organelles

organisms and their excretory organelles

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd