The ultimate source of all the change is
Correct answer: B. Mutation
- A. Migration
- B. Mutation
- C. Genetic drift
- D. Selection
Explanation
Random mutations are the ultimate source of genetic variation. Mutations are likely to be rare and most mutations are neutral or deleterious, but in some cases, the new alleles can be favoured by natural selection.
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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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