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A metamale (or supermale) is a low viability Drosophila fruit fly with a male phenotype in which the ratio of X chromosomes to sets of autosomes (A) is less than 0.5. [1] For example: a fly with one X chromosome and two sets of autosomes is a normal male, a fly with one X chromosome and three sets of autosomes is a metamale.
Drosophila melanogaster can be distinguished from related species by the following combination of features: gena ~1/10 diameter of eye at greatest vertical height; wing hyaline and with costal index 2.4; male protarsus with a single row of ~12 setae forming a sex comb; male epandrial posterior lobe small and nearly triangular; female abdominal ...
This ratio is used primarily for determining the sex of some species, such as drosophila flies and the C. elegans nematode. [1] The first use of this ratio for sex determination is ascribed to Victor M. Nigon. [1] Generally, a 1:1 ratio results in a female and a 1:2 ratio results in a male. When calculating the ratio, Y chromosomes are ignored.
A species of Drosophila mating via male mounting onto the female from behind. D. subobscura is monandrous, a behavior not usually seen among Drosophila. [28] Visual stimuli dictate courtship behavior. [29] D. subobscura do not mate in the dark [30] and do not produce a courtship song via wing vibrations like other species of Dipterans. [31]
A metafemale (or superfemale) is a low viability Drosophila fruit fly with a female phenotype in which the ratio of X chromosomes to sets of autosomes (A) exceeds 1.0. [1] For example: a fly with one X chromosome and two sets of autosomes is a normal male, a fly with two X chromosomes and two sets of autosomes is a normal female, and a fly with three X chromosomes and two sets of autosomes (or ...
Perfuming a D. simulans female with 7,11-HD is sufficient to suppress D. simulans male courtship. [2] [4] Studies have provided evidence that paternal leakage is an integral part of the inheritance of this species. [5] Wolbachia infections give insight into how certain species of Drosophila are related.
X hyperactivation refers to the process in Drosophila by which genes on the X chromosome in male flies become twice as active as genes on the X chromosome in female flies. Because male flies have a single X chromosome and female flies have two X chromosomes, the higher level of activation in males ensures that X chromosome genes are overall ...
Drosophila (/ d r ə ˈ s ɒ f ɪ l ə, d r ɒ-, d r oʊ-/ [1] [2]) is a genus of fly, belonging to the family Drosophilidae, whose members are often called "small fruit flies" or pomace flies, vinegar flies, or wine flies, a reference to the characteristic of many species to linger around overripe or rotting fruit.