What is the ploidy level of Ceratopteris gametophyte its Ant

Solution

Answer:

Ploidy level of Ceratopteris gametophyte: Haploid gametophyte

Its antheridia and archegonia: Haploid

Its gametes: Haploid gametes (sperm and ovum)

Ceratopteris combines the features of both \'higher\' and \'lower\' plant systems. The developmental simplicity and haploid condition of the gametophyte phase provides opportunities that are not available in angiosperm models. At the same time, the ability to also study any genotype or process within the complex vascular sporophyte phase allows direct comparisons with higher plant systems (e.g., Arabidopsis) that are not possible with developmentally simpler systems such as mosses (e.g., Physcomitrella) or algae.

As an homosporous fern, Ceratopteris has two independent, autotrophic phases: a developmentally simple haploid gametophyte and a vascular diploid sporophyte. The gametophyte phase, which develops after germination of the single-celled spore, can be cultured axenically on a simple inorganic nutrient medium. Development of this haploid phase is very rapid. Germination occurs at three days from inoculation and full sexual maturity is attained within six days from germination.