[Campbell Biology P.660] Which stage s in the Chlamydomonas life cycle diagram Figure 28.25 ... | Practice Question

Which stage s in the Chlamydomonas life cycle diagram Figure 28.25 represent the formation of genetically identical daughter cells clones ?

  • A: Stage 1 and Stage 2
  • B: Stage 3 and Stage 4
  • C: Stage 6 and Stage 7
  • D: Stage 5 only

Explanation

The "VISUAL SKILLS" prompt asks to circle stages where clones are formed, producing genetically identical new daughter cells. This corresponds to asexual reproduction. According to the diagram, Stage 6 states "When a mature cell reproduces asexually, it resorbs its flagella and then undergoes two rounds of mitosis, forming four cells more in some species ." Mitosis produces genetically identical cells. Stage 7 states "These daughter cells develop flagella and cell walls and then emerge as swimming zoospores from the parent cell. The zoospores develop into mature haploid cells." These zoospores are the products of asexual reproduction and are clones. Therefore, stages 6 and 7 represent clone formation.