Source: Adapted from C. A. Huether et al., Maternal age specific risk rate estimates for Down syndrome among live births in whites and other races from Ohio and Metropolitan Atlanta, 1970-1989, Journal of Medical Genetics 35: 482-90 (1998). Figure 8.20B Maternal age and incidence of Down syndrome
-In comparing a frog cell in metaphase of mitosis with one in metaphase I of meiosis, how would tell you which was which?
A) In mitosis, the chromosomes would be unduplicated (single-stranded) and in meiosis, they would be double-stranded (made up of sister chromatids).
B) In meiosis, the chromosomes would be unduplicated (single-stranded) and in mitosis, they would be double-stranded (made up of sister chromatids).
C) Unlike meiosis, in mitosis each chromosome would be paired with its homolog.
D) Unlike mitosis, in meiosis each chromosome would be opposite its homolog.

Question

Source: Adapted from C. A. Huether et al., Maternal age specific risk rate estimates for Down syndrome among live births in whites and other races from Ohio and Metropolitan Atlanta, 1970-1989, Journal of Medical Genetics 35: 482-90 (1998). Figure 8.20B Maternal age and incidence of Down syndrome
-In comparing a frog cell in metaphase of mitosis with one in metaphase I of meiosis, how would tell you which was which?
A) In mitosis, the chromosomes would be unduplicated (single-stranded) and in meiosis, they would be double-stranded (made up of sister chromatids). 
B) In meiosis, the chromosomes would be unduplicated (single-stranded) and in mitosis, they would be double-stranded (made up of sister chromatids). 
C) Unlike meiosis, in mitosis each chromosome would be paired with its homolog. 
D) Unlike mitosis, in meiosis each chromosome would be opposite its homolog.

Quizplus · Accepted Answer

In metaphase I of meiosis, homologous chromosomes pair up and align opposite each other along the metaphase plate, which does not occur in metaphase of mitosis. In mitosis, individual chromosomes align at the metaphase plate without pairing with their homologs.