Concepts of Biology
1st Edition
ISBN:9781938168116
Author:Samantha Fowler, Rebecca Roush, James Wise
Publisher:Samantha Fowler, Rebecca Roush, James Wise
Chapter6: Reproduction At The Cellular Level
Section: Chapter Questions
Problem 2RQ: A diploid cell has _ ____ the number of chromosomes as a haploid cell. a. one-fourth b. one-half c....
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Question
- Which cell is considered a haploid cell? (has half the number of chromosomes?) Why?
Expert Solution
Step 1
Answer: A cell is the basic unit of life. a cell has 46 chromosomes ( 23 pair of chromosomes ). Every cell is in the diploid condition, diploid means (2n) ploidy and haploid cells have (n) ploidy.
HAPLOID CELLS: A cell which contains n number of ploidy means half number of chromosomes (23).
DIPLOID CELLS: A cell which contains 2n number of ploidy means complete number of chromosomes (46).
REASON : A cell changes its ploidy by division, that is meiosis , it is a reductional division.
2n -------> 4n -------> 2n + 2n -------> n+n+n+n
A cell remains in 2n ploidy by division, that is mitotic , it is a equational division.
2n -------> 4n -------> 2n + 2n
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