6.7.C—Explain how alterations in DNA sequences contribute to variation that can be subject to natural selection
- Syllabus
- 2025
- Objective
- 6.7
- Level
- —
6.7.C—Explain how alterations in DNA sequences contribute to variation that can be subject to natural selection
Explain how alterations in DNA sequences contribute to variation that can be subject to natural selection.
- Changes in genotype may affect phenotypes that are subject to natural selection. Genetic changes that enhance survival and reproduction can be selected for by environmental conditions.
- i. The horizontal acquisitions of genetic information in prokaryotes via transformation (uptake of DNA), transduction (viral transmission of genetic information), conjugation (cell-to-cell transfer of DNA), and transposition (movement of DNA segments within and between DNA molecules) increase genetic variation.
- ii. Related viruses can recombine genetic information if they infect the same host cell.
- iii. Reproductive processes that increase genetic variation are evolutionarily conserved and are shared by various organisms.
ConceptAP Biology