Chromatids
Sister chromatids are 2 identical strands containing DNA that have a double helix structure. They are held together at the centromere after being copied in the S-Phase of the Cell cycle[1]. During mitosis chromatids separate, each entering identical daughter cells.
Image 1: An image of sister chromatids[2].
Dyad
A dyad[3] is a sister pair of chromatids. These are generated in prophase 1 of meiosis. The two sisters line up side by side and share a centromere.
References
- ↑ Alberts et al. (2008) The Molecular Biology Of The Cell, 5th edition, New York:Garland Science.
- ↑ “Sister Chromatid/ Chromosome Confusion...?” Yahoo! Answers, Yahoo!, 2000, answers.yahoo.com/question/index?qid=20110316132406AABhgVk.
- ↑ Alberts et al, (2008) Molecular Biology of the Cell. 5th edition. New York, Garland Science