A bivalent consists of:
Correct answer: C. Four chromatids and two centromeres
- A. Two chromatids and one centromere
- B. Two chromatids and two centromeres
- C. Four chromatids and two centromeres
- D. Four chromatids and four centromeres
Explanation
A bivalent, also known as a tetrad, forms during meiosis when two homologous chromosomes pair up. Each homologous chromosome consists of two sister chromatids, resulting in a total of four chromatids. These chromatids are organized into two pairs, each connected by a centromere, thus giving us two centromeres in a bivalent. This configuration facilitates the process of genetic recombination and ensures accurate segregation of chromosomes during cell division. Options A and B incorrectly describe the number of chromatids, while Option D incorrectly states the number of centromeres.
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