The stage of cell division in a diploid organism with seven chromosomes, each consisting of a pair of sister chromatids, is most likely Meiosis I anaphase. Here option C is correct.
Number of chromosomes: In a diploid organism, each cell normally has a full set of chromosomes, typically in pairs (homologous pairs). Seven chromosomes indicate that either there are only seven pairs in the organism's genome (haploid organisms have single chromosomes), or we are observing just a subset of the total chromosomes during cell division.
Sister chromatids: Each chromosome having a pair of sister chromatids suggests DNA replication has already occurred. This is a crucial step in both mitosis and meiosis, where the DNA is duplicated to ensure each daughter cell receives a complete set of chromosomes.
Anaphase: The presence of sister chromatids separated and moving towards opposite poles of the cell points to the anaphase stage of cell division. During anaphase, the spindle fibers pull the sister chromatids apart, ensuring each daughter cell receives one copy of each chromosome. Here option C is correct.
Complete question:
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