×

UPSC Courses

DNA banner

DAILY NEWS ANALYSIS

GS-III :
  • 29 June, 2020

  • 5 Min Read

Gyanandromorphism

The rare biological phenomenon in dragonflies sighted at Kole wetlands

  • When Renjith R.V and Vivek Chandran spotted a peculiar dragonfly, the Scarlet Skimmer (Crocothemis servilia), in the Puzhakkal area of the Kole wetlands in Thrissur last year, little did they know that they were documenting a very rare biological phenomenon.
  • The male dragonflies typically have prominent blood red colouraton in almost all their body parts, including the head, thorax, abdomen and legs, and the female is a pale yellow in colour with a dark brown thorax and legs.
  • But the one they spotted on July 14 as part of the Kole Odonata Survey 2019, was “part red and part yellow”.
  • Later, while compiling data, they were thrilled to find that they had recorded gynandromorphism — a very rare biological phenomenon.

‘Genetic aberration’

  • Gynandromorphs are chimeric individuals having both male and female tissues and are viewed by the scientific community as a genetic aberration.
  • Even though common in some arthropod taxa such as Crustacea and Arachnida, the paper says it is very rare in Odonates and only 30 individuals from seven families have been reported with the condition worldwide.
  • The spotted individual showed bilateral gynandromorphism of only the thorax, half of which showed blood red colouration as in males, and the other half had the pale yellow characteristics of females.
  • The individual had a mix of male and female external characters, ranging from almost entirely female to about equally divided.

Odonate:

  • They are predaceous insects comprising the dragonflies and damselflies.

Arthropod:

  • An arthropod is an invertebrate animal having an exoskeleton, a segmented body, and paired jointed appendages. Arthropods form the phylum Euarthropoda, which includes insects, arachnids, myriapods, and crustaceans.

Gyanandromorph:

  • A gynandromorph is an organism that contains both male and female characteristics.

Source: TH


Draft Indian Nutrition Rating (INR)

Draft Indian Nutrition Rating (INR) The country's top food regulator, the Food Safety and Standards Authority of India (FSSAI), has published a draft regulation for front-of-pack labeling. Major Points This draft notification addresses front-of-pack labelling in an effort to deter customers from purchasing packaged foods that are h

Social Audit of Social Sector Scheme

Social Audit of Social Sector Scheme The Rajasthan government has made the first-ever decision in the nation to create a specialized social and performance audit authority to undertake social audits of initiatives. What does this decision mean, exactly? Make public accountability a priority: In addition to conducting performance

Dharamshala Declaration 2022

Dharamshala Declaration 2022 & Tourism In India A recent three-day national tourist conference saw the introduction of the "Dharamshala Declaration 2022." Details about the news In the National Conference, the Center announced a comprehensive plan for the tourism industry. By 2024, tourism will have returned to its p

National Assessment & Accreditation Council (NAAC)

National Assessment & Accreditation Council (NAAC) & Higher Education The Maharaja Sayajirao University of Baroda's National Assessment and Accreditation Council (NAAC) ratings recently sparked controversy since the institution's grade increased from A to A+ as a result of improvements across all areas. What is India's

Ethereum Merger

Ethereum Merger The second-most valued cryptocurrency in the world, Ethereum, just underwent a substantial software upgrade. About: Ethereum redesign: This process is referred to as "The Merge." It will do away with the requirement for cryptocurrency miners and massive mining farms, which previously powered the blockchai

Toppers

Search By Date

Newsletter Subscription
SMS Alerts