Question

The cells of fern prothallus contains nucleus with

• A. 4n chromosomes
• B. 3n chromosomes
• C. 2n chromosomes
• D. n chromosomes

Answer 1

The correct option is D n chromosomes

The cells of fern prothallus contains nucleus with haploid (n) chromosomes. Prothallium, or prothallus is the gametophyte stage in the life cycle of fern. The prothallium develops from a germinating spore. It is a short-lived and inconspicuous heart-shaped structure typically 2-5 millimeters wide, with a number of rhizoids (root-like hairs), growing underneath, and the sex organs: archegonium (female) and antheridium (male).

so, the correct answer is 'n chromosomes'