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

Write in 5-6 lines about food pyramid, Write in 5-6 lines about food pyrami...

Write in 5-6 lines about food pyramid. The diabetes food pyramid divides food into six groups. These groups vary with each other on the basis of si-e occupied in the pyramid.

Explain separation of homologous chromosomes, Q. What are the respective fu...

Q. What are the respective functions of the separation of homologous chromosomes and of the separation of alike chromatids in meiosis? The separation of homologous chromosomes

What is the difference between spermatids and sperm cells, What is the diff...

What is the difference between spermatids and sperm cells? What is the name of the transformation of spermatids into sperm cells? Sperm cells (the male gametes) are matured spe

What is meant by the substrates of enzymatic reactions, Q. What is meant by...

Q. What is meant by the substrates of enzymatic reactions? The Substrates are reagent molecules upon which enzymes act. The enzyme has spatial binding sites for the attachmen

Estimation of protein by miscellaneous parameters include, Estimation of pr...

Estimation of protein by Miscellaneous parameters include? Miscellaneous parameters include Plasma amino acid levels Microbiological methods Chemical scoring

Protein necessity, Proteins necessity They are called as body builde...

Proteins necessity They are called as body builders. The proteins are used in various metabolic pathways and body building. They help in repairing the tissues of the b

Zoology, Phylum coelenterata

Phylum coelenterata

Enumerate about the reitan aphasia screening test, Enumerate about the Reit...

Enumerate about the Reitan Aphasia Screening Test This test serves two purposes in that it contains both copying and language-related tasks. As an Aphasia screening procedure,

Explain why exact replication of dna is necessary, Figure  shows part of a ...

Figure  shows part of a DNA molecule (a) (i) What do the dotted lines in Figure represent?  (ii) Name J to M. J.............................. K..............................

Indications for surgery-pericardial effusion, Pericardial Effusion:  Indica...

Pericardial Effusion:  Indications for Surgery: Pericardial effusion may be the result of peiicarditis due to infection, autoimmune disease or neoplasm. Non-inflammatoly diseases

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