How many chromosomes are in a normal human body cell?
Answer and explanation
Correct answer: A. 46, which form 23 pairs
- Step 1: Humans have 23 pairs of chromosomes. Step 2. 23 x 2 = 46. Answer: 46. Why not the others: 23 is the number in a gamete; 44 excludes the sex chromosomes; 48 is not the human number.
Practise more Physics, Chemistry and Biology Basics.
Free questions with an explanation for every one, and full timed Iraqi Third Intermediate Ministerial Exams mock tests.
More Physics, Chemistry and Biology Basics questions
- Which part of a plant cell is mainly responsible for photosynthesis?
- Which gas do plants take in from the air as a raw material for photosynthesis?
- What is the chemical formula of water?
- What is the SI unit of electrical resistance?
- A current of 2 A flows through a resistor of 6 ohms. What is the potential difference across the resistor?
- What is the chemical symbol for sodium?