science
Grade-10
Easy
Question
Which life cycle is seen in Chlamydomonas?
Haplontic
Diplontic
Haplo-diplontic
None of the above
Haplontic
Diplontic
Haplo-diplontic
None of the above
Hint:
Set of chromosomes found in gametes.
The correct answer is: Haplontic
Alteration of generation is a common phenomenon found in plants and algae. The diploid and haploid stages appear alternating during their life cycle.
Alteration of generation depends upon the type of plant. In some, the diploid stage is dominant (like bryophytes) while haploid stage is dominant in others (like tracheophytes).
The gametophytic stage is dominant in Chlamydomonas and hence, haplontic in nature. This is because, the only diploid phase zygote undergoes meiosis and forms meiospores which are haploid.
- Alteration of generation depends upon plant or algae
- Chlamydomonas have dominant gametophytic stage
- Gametophytic stage are haplontic in nature
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