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
-What is the stage of cell division in a diploid organism if you see seven chromosomes, each consisting of a pair of sister chromatids?
A) mitosis prophase
B) mitosis anaphase
C) meiosis I anaphase
D) meiosis II prophase

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
-What is the stage of cell division in a diploid organism if you see seven chromosomes, each consisting of a pair of sister chromatids?
A) mitosis prophase 
B) mitosis anaphase 
C) meiosis I anaphase 
D) meiosis II prophase

Quizplus · Accepted Answer

In meiosis II prophase, each chromosome consists of two sister chromatids, and the number of chromosomes is halved compared to the diploid number, which matches the description of seven chromosomes.