Question

Nondisjunction event Number of chromosomes in gametes 1. Meiosis occurs normally (no nondisjunction) 2. Nondisjunction of one chromosome pair in meiosis I 3. Nondisjunction of all three chromosome pairs in meiosis I (assume all chromosomes go to the same pole) 4. Nondisjunction of one chromosome in one daughter cell in meiosis II 5. Nondisjunction of all three chromosomes in one daughter cell in meiosis II (assume all chromosomes go to the same pole)

          Nondisjunction event
Number of chromosomes in gametes
1. Meiosis occurs normally (no nondisjunction)
2. Nondisjunction of one chromosome pair in meiosis I
3. Nondisjunction of all three chromosome pairs in meiosis I (assume all chromosomes go to the same pole)
4. Nondisjunction of one chromosome in one daughter cell in meiosis II
5. Nondisjunction of all three chromosomes in one daughter cell in meiosis II (assume all chromosomes go to the same pole)

Nondisjunction event
Number of chromosomes in gametes
1. Meiosis occurs normally (no nondisjunction)
2. Nondisjunction of one chromosome pair in meiosis I
3. Nondisjunction of all three chromosome pairs in meiosis I (assume all chromosomes go to the same pole)
4. Nondisjunction of one chromosome in one daughter cell in meiosis II
5. Nondisjunction of all three chromosomes in one daughter cell in meiosis II (assume all chromosomes go to the same pole)

Added by Michael C.

Biology for AP Courses

Julianne Zedalis, John Eggebrecht

Instant Answer

Solved by Expert Madhur L

07/27/2023

Step 1

Meiosis occurs normally (no nondisjunction): In this case, each gamete will have half the number of chromosomes, so if there are 6 chromosomes, each gamete will have 3 chromosomes. So the answer is $\boxed{3}$. Show more…

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Number of chromosomes (n) in gametes Nondisjunction event Meiosis occurs normally (no nondisjunction) 0 or 3 Nondisjunction of one chromosome pair in meiosis 0 or 2 2 or 4 Nondisjunction of all three chromosome pairs in meiosis (assume all chromosomes go to the same pole) 0, 3, or 6 2 or 4 Nondisjunction of one chromosome in one daughter cell in meiosis II Nondisjunction of all three chromosomes in one daughter cell in meiosis II (assume all chromosomes go to the same pole)