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

Drowning - paediatric emergencies, Drowning: Drowning is a cause of a...

Drowning: Drowning is a cause of accidental death  in children Accidental drowning may occur because children  do not  have adequate protective supervision.  It may be defined

Does rna molecule have two polynucleotide chains like dna, Does RNA molecul...

Does RNA molecule have two polynucleotide chains like DNA? Only DNA has two polynucleotide chains. RNA is produced by just one polynucleotide chain. Nucleic Acid Review - Im

Find out the degrees of freedom, -The expected phenotypic ratio of offsprin...

-The expected phenotypic ratio of offspring. -The expected genotypic ratio of offspring. -Calculate the expected values you would use on a chi-square test (use genotypic rati

Define the magnesium requirements in body, Define the Magnesium Requirement...

Define the Magnesium Requirements in body? Let us learn about the magnesium requirements. Since plant foods are particularly high in magnesium, on a vegetarian diet with plenty

Why water and electrolytes are important for exercise, Why Water and Electr...

Why Water and Electrolytes are important for exercise? Water and electrolytes are important for exercise performance as they maintain blood volume and osmolality, thermoregulat

Define food business and food technology, Define Food Business and Food Tec...

Define Food Business and Food Technology? The food business and food technology are practically inseparable. The food business may be characterized as: vulnerable to spoilage,

Consciousness as inner state, Q. Explain Consciousness as inner state? ...

Q. Explain Consciousness as inner state? Consciousness as inner state: We are conscious of thoughts, images, emotions and memories within ourselves though they may not have phy

After the blastula stage what is the next stage, Q. After the blastula stag...

Q. After the blastula stage what is the following stage of the embryonic development? What is the passage from blastula to the next stage called? The blastula turns into gastru

What are the maximum crop yields, What are the Maximum Crop Yields   Mi...

What are the Maximum Crop Yields   Mitscherlich conducted a large number of experiments with different plants, making use of pots 20 cm in diameter and 20 cm in depth. By addin

Which of these are best and why, Suppose you were presented with two 40X le...

Suppose you were presented with two 40X lenses to use on your microscope, lens A had a numerical aperture of 0.56 and lens B had a numerical aperture of 0.75. Which is best and why

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