Question 43
Chromosomes, DNA and Sex LinkageWhich of the following statements about chromosomes is correct?
- A.All the chromosomes of a species are the same in shape
- B.The number present in a species is constant
- C.They are neatly arranged in the cytoplasm
- D.They bear ribosomes on their outer membranes.
Show the answer and explanation
Answer: B (The number present in a species is constant)
Explanation
Each species has a fixed chromosome number (e.g. 46 in human body cells); chromosomes differ in shape and are in the nucleus.