Related Experiment Video
Updated: Jun 5, 2026
07:54
Manipulation of Ploidy in Caenorhabditis elegans
Published on: March 15, 2018
The persistence of haplodiploidy in algae
1Friday Harbor Laboratories, 620 University Road, Friday Harbor, WA 98250, USA.
Trends in Ecology & Evolution
|January 18, 2011
Summary
Haplodiploidy is common in eukaryotic algae, suggesting it
Area of Science:
- * Evolutionary biology
- * Life cycle analysis
- * Algal genomics
Background:
- * Haplodiploid life cycles are prevalent across various eukaryotic algal lineages.
- * This widespread occurrence challenges the view of haplodiploidy as a transient phase.
Purpose of the Study:
- * To investigate the evolutionary stability of haplodiploidy in algae.
- * To explore selective pressures maintaining haplodiploidy.
- * To gain insights into the evolution of sexual reproduction.
Main Methods:
- * Comparative analysis of algal life cycles.
- * Phylogenetic reconstruction of life history traits.
- * Theoretical modeling of selection pressures.
Main Results:
- * Haplodiploidy is a persistent and stable life history trait in diverse algal groups.
- * Evidence suggests specific selective mechanisms favor its retention.
Conclusions:
- * Haplodiploidy in algae represents a stable evolutionary strategy, not merely a transitional phase.
- * Understanding algal haplodiploidy offers crucial insights into the broader evolution of sex.
Related Concept Videos
01:23Red Algae
Red algae, also known as rhodophytes, are primarily found in marine environments, though some species inhabit freshwater and terrestrial ecosystems. These organisms exist in both unicellular and multicellular forms, with some multicellular varieties reaching macroscopic sizes.As phototrophic organisms, red algae contain chlorophyll a; however, their chloroplasts lack chlorophyll b. Instead, they possess phycobiliproteins, which serve as major light-harvesting pigments, similar to those found in...
01:28Overview of Algae
The kingdom Archaeplastida encompasses red and green algae, along with land plants. Unlike other protists with chloroplasts that arose through secondary endosymbiosis, only red and green algae originated from primary endosymbiotic events. This diverse group of eukaryotic organisms contains chlorophyll and performs oxygenic photosynthesis.Algae exist in various forms, from large brown kelp in coastal waters to green scum in puddles and stains on rocks or soil. Some species are responsible for...
01:21Green Algae
Green algae, also referred to as chlorophytes, are different from red algae in having the chloroplasts containing chlorophylls a and b, which give them their distinct green hue. However, they lack phycobiliproteins, preventing them from developing the red or blue-green pigmentation seen in red algae. In terms of photosynthetic pigment composition, green algae closely resemble plants and share a close evolutionary relationship with them. Taxonomically Green algae belong to Phylum Chlorophyta in...
01:27Diversity of Protists IV
Amoebozoa represent a diverse group of terrestrial and aquatic protists that utilize lobe-shaped pseudopodia for locomotion and feeding. This characteristic differentiates them from the Rhizaria, which possess threadlike pseudopodia. The primary classifications within Amoebozoa include gymnamoebas, entamoebas, and the plasmodial and cellular slime molds. Phylogenetic evidence indicates that Amoebozoa diverged from a lineage that ultimately gave rise to fungi and animals.Gymnamoebas and...
01:19Other Algae
The group Stramenopiles include some phototrophic microorganisms. Members of this group possess flagella covered in numerous short, hairlike extensions, a feature that inspired the group's name, derived from the Latin words for "straw" and "hair." Some of the main categories of Stramenopiles include diatoms, golden algae, and brown algae.Diatoms are unicellular, photosynthetic eukaryotes, with over 200 known genera. They play a key role in the planktonic communities of both marine and...
01:31Formation of Species
Speciation describes the formation of one or more new species from one or sometimes multiple original species. The resulting species are discrete from the parent species, and barriers to reproduction will typically exist. There are two primary mechanisms, speciation with and without geographic isolation—allopatric and sympatric speciation, respectively.Allopatric SpeciationIn allopatric speciation, gene flow between two populations of the same species is prevented by a geographic barrier, like...