Question
Nondisjunction is the process where chromosomes do not separate properly during meiosis. This error can occur during meiosis I or meiosis II.
Tweety207. “Nondisjunction diagrams”. May 2013. CC BY-SA 3.0. commons.wikimedia.org/wiki/File:Nondisjunction_diagrams.svg
Which of the following accurately describes the resulting zygotes?
Zygote 1 will have abnormalities.
Zygote 2 has too few chromosomes.
Zygote 3 has too many chromosomes.
Zygote 4 will be normal.
Tweety207. “Nondisjunction diagrams”. May 2013. CC BY-SA 3.0. commons.wikimedia.org/wiki/File:Nondisjunction_diagrams.svg
Which of the following accurately describes the resulting zygotes?
Zygote 1 will have abnormalities.
Zygote 2 has too few chromosomes.
Zygote 3 has too many chromosomes.
Zygote 4 will be normal.
Answers
GPT-4o mini
Nondisjunction during meiosis can lead to gametes with an abnormal number of chromosomes. Depending on whether nondisjunction occurs during meiosis I or meiosis II, the resulting zygotes can display various chromosomal abnormalities.
1. **Zygote 1 will have abnormalities.** - This statement can be true because if zygote 1 comes from a gamete with an abnormal number of chromosomes, it likely has chromosomal abnormalities.
2. **Zygote 2 has too few chromosomes.** - If zygote 2 is formed from a gamete that has lost a chromosome due to nondisjunction, then this statement would be accurate.
3. **Zygote 3 has too many chromosomes.** - Conversely, if zygote 3 comes from a gamete that has an extra chromosome due to nondisjunction, then this statement is also correct.
4. **Zygote 4 will be normal.** - If zygote 4 is derived from normal gametes and experiences no errors of separation, then it would be normal.
In conclusion, depending on the specifics of the nondisjunction error that led to the gametes and zygotes, statements about their chromosomal composition and abnormalities can be accurately described as mentioned.
1. **Zygote 1 will have abnormalities.** - This statement can be true because if zygote 1 comes from a gamete with an abnormal number of chromosomes, it likely has chromosomal abnormalities.
2. **Zygote 2 has too few chromosomes.** - If zygote 2 is formed from a gamete that has lost a chromosome due to nondisjunction, then this statement would be accurate.
3. **Zygote 3 has too many chromosomes.** - Conversely, if zygote 3 comes from a gamete that has an extra chromosome due to nondisjunction, then this statement is also correct.
4. **Zygote 4 will be normal.** - If zygote 4 is derived from normal gametes and experiences no errors of separation, then it would be normal.
In conclusion, depending on the specifics of the nondisjunction error that led to the gametes and zygotes, statements about their chromosomal composition and abnormalities can be accurately described as mentioned.