Question

Refer to the given figure showing life cycle patterns and identify them.

• A. (A) - Diplontic, (B) - Haplontic
• B. (A) - Haplontic, (B) - diplontic
• C. (A) - Haplo-diplontic, (B) - Haplontic
• D. (A) - Haplo-diplontic, (B) - Diplontic

Answer 1

The correct option is B (A) - Haplontic, (B) - diplontic

• In the haplontic life cycle mitosis only occur in the haploid cells which results in the formation of single haploid cells or a multicellular haploid organism. Here the gametes are produced through mitotic division. Such a life cycle is found in most fungi and in some algae like Chlamydomonas.
• In a diplontic life cycle, mitotic divisions only occur in diploid cells. Gametes are only produced during the haploid phase. Zygote division occurs through mitotic division. For example, it occurs in animals.
• So the correct answer is option B.