These coins come from many of the most recognizable world powers, including the United States, Canada, Mexico, Britain, Australia, and China. Though there are silver coins that are released by governments all over the world, these countries are the most well-known.
Nirmala Agarwal. Advertisements: Chromosome: 1. Chromosomes are single physical structure and hereditary traits, which are transmitted through them. 2. The structure of chromosome is best studied at the metaphase, which possesses two chromatids held by a single centromere. Chromatid: 1. Each chromosome consists of two symmetrical strands called chromatids, formed during S-phase. 2. Each chromatid is half of the metaphase chromosome.
The answer is 20. Duplicated chromosome has two sister chromatids, identical copies of the chromosome. These two chromatids are joined at the region called centromere. Therefore, one duplicated chromosome has one centromere and two sister chromatids. If there are 20 duplicated chromosomes in a cell, there will be 20 centromeres.