What is the Apterous mutation?
What is the Apterous mutation?
Mutations at the apterous (ap) locus in Drosophila melanogaster give rise to three distinct phenotypes: aberrant wings, female sterility and precocious adult death. The wing phenotype includes five types of abnormality: blistering, deficiencies, duplications, high-order repetitions and transformation of structures.
What does the Apterous gene do?
The apterous (ap) gene is required for the normal development of the wing and haltere imaginal discs in Drosophila melanogaster. ap encodes a new member of the LIM family of developmental regulatory genes.
Is the Apterous wing mutation dominant or recessive?
recessive
Since the apterous character is recessive, the symbols for the.
On which chromosome is the Apterous gene located?
This mutant,’which occurred spontaneously, was shown by C. W. METZ (1914) to be recessive and located on the second chromosome near the black (6) locus.
What does Apterous mean in biology?
apterous (not comparable) (zoology) Destitute of wings; wingless. quotations ▼ (biology) Destitute of winglike membranous expansions, as a stem or petiole.
What causes vestigial wings in Drosophila?
Flies with vestigial wings cannot fly: they have a defect in their “vestigial gene,” on the second chromosome. These flies have a recessive mutation. Of the pair of vestigial genes carried by each fly (one from each parent), both have to be altered to produce the abnormal wing shape.
Is Apterous recessive?
In traditional or Mendelian genetics, the gene for apterous flies is a recessive trait. This means that a fruit fly must get the gene for aptery from both parents. If the fly has a single copy of the gene for normal wings, it will mask the presence of the gene for aptery and the fly will develop normal wings.
What are sepia eyes?
Brown and sepia eyes are a result of a recessive gene and only occur when two sepia-eyed flies mate. White, vermillion and cinnabar-eyed fruit flies result from mutations and are far less common. Because fruit flies are genetically simple insects and have rapid life cycles, they are ideal subjects for biological study.
What are Apterous insects?
Apterous insects are those without wings. For example, bristletails. Insects, like this Sea Bristletail (Petrobius maritimus), are described as apterous or without wings. The term Apterous can also be used to describe insects that had wings but have subsequently lost them, such as fleas.
What is the inheritance pattern of the Apterous trait?
Genetics. In traditional or Mendelian genetics, the gene for apterous flies is a recessive trait. This means that a fruit fly must get the gene for aptery from both parents. If the fly has a single copy of the gene for normal wings, it will mask the presence of the gene for aptery and the fly will develop normal wings.
What is ebony gene?
The ebony gene encodes a protein that converts dopamine into N-β-alanyl dopamine (NBAD), and the tan gene encodes a protein that catalyzes the reverse reaction, converting NBAD back into dopamine (Figure 1A).