Plant-Kingdom Question 757
Question: In Funaria, 20 chromosomes are present in rhizoids, then the number of chromosome in calyptra, rheca and foot will be:
Options:
A) 20, 40, 40 respectively
B) 40, 20, 20 respectively
C) 20, 40, 20 respectively
D) 40, 10, 20 respectively
Show Answer
Answer:
Correct Answer: A
Solution:
[a] In Funaria, dominant phase of life cycle is haploid or gametophytic, so in rhizoid cell, $ n=20 $ .
Calyptra develops from the venter-wall of archegonium, so chromosome number is 20.
Theca and foot are the parts of sporophyte hence, chromosome number.
$ 2n=40 $
BETA
