Diploidy and haploidy, Biology

Assignment Help:

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.

 


Related Discussions:- Diploidy and haploidy

What are the trends of the gametophyte, What are the trends of the gametoph...

What are the trends of the gametophyte in the evolution of plants? A tendency of the gametophyte evolution in plants has been towards the formation of gametes that are independ

State the strengths of brief screening measures, Strengths of Brief Screeni...

Strengths of Brief Screening Measures 1) Inexpensive, rapid, portable 2) Needs less training in administration and interpretation 3) Differentiating between dementia and

Tropical seasonal forests - ecosystem, Tropical seasonal forests - Ecosyste...

Tropical seasonal forests - Ecosystem Tropical seasonal forests occur in regions where total annual rainfall is very high but segregated into pronounced wet and dry periods. T

Explain the term indirect calorimetry, Explain the term Indirect Calorimetr...

Explain the term Indirect Calorimetry? This method estimates energy expenditure by determining the oxygen consumption and carbon dioxide production of the body or a cell over a

Determine some food sources for copper, Determine some Food Sources for Cop...

Determine some Food Sources for Copper? Foods containing more than 1 mg copper per 1000 kilocalories are considered high in copper and include green leafy vegetables, nuts, leg

Ontogeny, Ontogeny: This is the study of history of an individual. Ontogen...

Ontogeny: This is the study of history of an individual. Ontogeny is also known as ontogenesis and morphogenesis. Ontogeny describes the origin or the development of an organism -

Why is iodine important for human beings, Why is iodine important for human...

Why is iodine important for human beings? Iodine is a fundamental chemical element for the proper functioning of the thyroid since it is part of the hormones produced by this g

How many grams of kanamycine would dissolve, To make a 40 mg/mL solution of...

To make a 40 mg/mL solution of kanamycin (MW 582.6) how many grams of kanamycine would you dissolve in 500 mL of water?

Skeleton, biological significant of a skeleton

biological significant of a skeleton

What are some industrial processes that use bacteria, What are some industr...

What are some industrial processes that use bacteria? Bacteria are used by industry in many ways. There are vaccines made of attenuated pathogenic bacteria or of antigens prese

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