Question

Which of the following correctly represents haplontic life cycle pattern from the options given?

• A. The haploid stage is unicellular and the diploid stage is also single cell, meiosis is "zygotic".
• B. The haploid stage is multicellular and the diploid stage is a single cell, meiosis is "zygotic".
• C. The haploid stage is unicellular and the diploid stage is multicellular, meiosis is "zygotic".
• D. The haploid stage is unicellular and the diploid stage is multicellular, meiosis is "non - zygotic".
• E. None of these

Answer 1

The correct option is B The haploid stage is multicellular and the diploid stage is a single cell, meiosis is "zygotic".

Sexual reproduction involves alternating haploid (n) and diploid (2n) stages, i.e., a change of ploidy from haploid to diploid and return from a diploid stage to a haploid stage. There are 3 types of cycles, haplontic life cycle in which the haploid stage is multicellular and the diploid stage is a single cell, formed by the fusion of two haploid cells or gametes, called the zygote. Meiosis is zygotic. Thus, the correct answer is option B.