Ophioglossum is a fern having highest number of chromosomes. Chromosomes number in meiocyte (2n)=1260.
Which organism has highest number of chromosome?
The organism with the highest chromosome number recorded in to date is estimated to be 1,440 (or 720 pairs) found in the adder’s tongue fern Ophioglossum reticulatum.
Which of the following organisms has the highest number of?
NEET Question. Ophioglossum reticulatum has the highest recorded chromosome count of any organism (cited in different studies as 2n = 1260 or, recently, as n = 760, the latter equivalent to 2n = 1520!). The fern called Ophioglossum reticulatum has 1260 chromosomes.
Which organism has the greatest number of chromosomes the least?
Largest number: In the fern family of plants, the species Ophioglossum reticulatum has about 630 pairs of chromosomes, or 1260 chromosomes per cell.
Which of the following organisms has the highest number of genes?
Even though the human genome is 3 billion letters long, it only holds about 20,000 genes .
|Organism Name||Escherichia coli |
|Approximate Genome size, in number of nucleotides (“letters”)||4,600,000 (4.6 million)|
|Number of protein-coding genes||5,000|
Which plant has least number of chromosomes?
Among Angiosperms, only six species are known to possess the lowest identified chromosome number, i.e. 2n = 4. These plants are the monocotyledons Zingeria biebersteiniana, Colpodium versicolor, Ornithogalum tenuifolium and Rhynchospora tenuis, and the dicotyledons Haplopappus gracilis and Brachyscome dichromosomatica.
How many chromosomes do giraffes have?
The giraffe genome comprises 15 pairs of chromosomes (2n = 30) that are believed to have originated by multiple Robertsonian fusions from the pecoran ancestral karyotype (2n = 58) [7, 8].
Which of the following is a unisexual organism?
Organism shown in figure (d) is Nereis. It is unisexual or dioecious and its reproductive phase is called ‘heteronereis’.
Which of the following organism has flagella all around the cell wall?
Figure 2-4 illustrates typical arrangements of flagella on or around the bacterial surface. For example, V. cholerae has a single flagellum at one pole of the cell (i.e., it is monotrichous), whereas Proteus vulgaris and E. coli have many flagella distributed over the entire cell surface (i.e., they are peritrichous).
Why single celled animals are immortal?
As we know, no individual is Immortal but unicellular organisms are said to be biologically immortal. It is because they do not grow old and die instead. They reproduce asexually and make offspring and they themselves become daughter cells. … Single celled organisms also die due to huge changes in temperature.
What organism has only one chromosome?
Haploid refers to a cell or an organism that has only a single set of chromosomes.
Do animals have more chromosomes than plants?
Every species has a characteristic number of chromosomes, called the chromosome number. Animals have more chromosomes; plants have fewer.