Q. If number of chromosomes in foot of fern embryo is 8, what should be the number in its spores?
A) 4
B) 8
C) 23
D) 16
Explanation
In ferns, the embryo is a diploid structure as it is formed by the fusion of gametes, while the spores are haploid structures formed by meiosis in diploid spore mother cell. Thus, if number of chromosome in embryo is 8 $(2n),$ then the number of chromosomes in spores shall be 4$(n).$
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.