Question
Read the sentences below and answer the question that follows.
Trisomy 21, otherwise known as Down syndrome, occurs due to a mistake in cellular reproduction. In Trisomy 21, the copies of the 21st chromosome do not split in the correct stage. As a result, one daughter cell receives two copies of the 21st chromosome.
Identify the stage of cellular reproduction where the error most frequently occurs and causes Down syndrome. Select the correct circle in the image below.
[Select only ONE choice]
Trisomy 21, otherwise known as Down syndrome, occurs due to a mistake in cellular reproduction. In Trisomy 21, the copies of the 21st chromosome do not split in the correct stage. As a result, one daughter cell receives two copies of the 21st chromosome.
Identify the stage of cellular reproduction where the error most frequently occurs and causes Down syndrome. Select the correct circle in the image below.
[Select only ONE choice]
Answers
GPT-4o mini
The error that leads to Trisomy 21 (Down syndrome) most frequently occurs during **meiosis**, specifically in **anaphase I** when homologous chromosomes are supposed to separate. If they fail to separate properly, it can result in one daughter cell receiving an extra chromosome.
However, since I cannot view images, you would need to select the circle that corresponds to the stage of **meiosis** or specifically **anaphase I** in the image you have.
However, since I cannot view images, you would need to select the circle that corresponds to the stage of **meiosis** or specifically **anaphase I** in the image you have.