The event at metaphase-I which increases the genetic diversity is the:
Correct answer: C. Random orientation of homologous chromosomes at the equator
- A. Formation of bivalents at the equator
- B. Contraction of the spindle fibres at both poles of the cell
- C. Random orientation of homologous chromosomes at the equator
- D. Dissociation of synaptonemal complex between homologous chromosomes
Explanation
The correct answer is the random orientation of homologous chromosomes at the equator during metaphase-I. This process, known as independent assortment, results in different combinations of maternal and paternal chromosomes being distributed to the gametes, thus increasing genetic diversity. The formation of bivalents and the dissociation of the synaptonemal complex are important processes in meiosis but do not directly contribute to genetic diversity. The contraction of spindle fibers facilitates chromosome movement but does not affect genetic variation.
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About Chromosomes
Chromosomes are DNA-protein structures that carry genes and become visible during cell division. Coverage includes chromatin, centromeres, sister chromatids, homologous chromosomes, chromosome number, and the distinction between diploid and haploid cells, with links to DNA replication, mitosis and meiosis.
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