What is the diploid number for adder’s tongue fern?
Adder’s tongue ferns are too well recognized to cytologist and evolutionary ecologists for their small size with the highest chromosome number (O. reticulatum L. with 2n = 1440) in any organism so far known in biological world1.
Why do Fern have so many chromosomes?
A lot of DNA in bigger genomes, like the ferns, is “junk DNA” and doesn’t actually code for anything useful. … In fact, the reason that ferns can have so many chromosomes is that they are ancient enough to have accumulated so many chromosomes.
How many chromosomes do plants have?
If the diploid chromosome number of a flowering plant is 24, then the somatic cells of the plant each contain 24 chromosomes (12 maternal and 12 paternal). Each of the three haploid nuclei in the germinated pollen grain must contain 12 chromosomes, and each of the 8 nuclei within the embryo sac contain 12 chromosmes.
Are plant cells diploid or haploid?
Unlike animals(see Chapter 2), plants have multicellular haploid and multicellular diploid stages in their life cycle. Gametes develop in the multicellular haploid gametophyte (from the Greek phyton, “plant”). Fertilization gives rise to a multicellular diploid sporophyte, which produces haploid spores via meiosis.
Is the diploid number 46 in the cells of all eukaryotes?
Each species of eukaryote has a characteristic number of chromosomes in the nuclei of its cells. Human body cells (somatic cells) have 46 chromosomes. A somatic cell contains two matched sets of chromosomes, a configuration known as diploid.
Is a plant leaf cell haploid or diploid?
Diploid cells – have two sets of chromosomes ( 2n ). Fig 12.6. Examples leaf, root, stem. Haploid cells – have one set of chromosomes ( n ).
What does 2n 23 mean?
It means the cell possesses a half number of chromosomes. For example, in human 23 chromosomes shows n condition. The 2n represents diploid condition. It means the cell possesses 2 nuclei along with 2 sets of the chromosome.