Why is XXY female in Drosophila?
Why is XXY female in Drosophila?
Sex Determination in Drosophila The balance between female-determining factors encoded on the X chromosome and male-determining factors encoded on the autosomes determines which sex-specific pattern of transcription will be initiated. Thus, XX, XXY, and XXYY flies are females, while XY and XO flies are males.
What are the chromosomes of Drosophila?
THE basic karyotype of Drosophila melanogaster, which can be seen in mitotically active neuroblasts of the larval brain, is comprised by four chromosomes, the X and Y sex chromosomes, two larger autosomal elements, chromosomes 2 and 3, and the small dot fourth chromosome (Figure 1) (Metz 1914; Deng et al.
What is amplification of chromosome?
Abstract. Gene amplification is a copy number increase of a restricted region of a chromosome arm. It is prevalent in some tumors and is associated with overexpression of the amplified gene(s).
What does it mean if a gene is amplified?
Listen to pronunciation. (jeen AM-plih-fih-KAY-shun) An increase in the number of copies of a gene. There may also be an increase in the RNA and protein made from that gene.
What is intersex in Drosophila?
In Drosophila melanogaster, the intersex (ix) is a terminally positioned gene in somatic sex determination hierarchy and function with the female specific product of double sex (DSX(F)) to implement female sexual differentiation.
How many pairs of chromosomes are present in Drosophila?
It has only four pairs of chromosomes – three autosomes, and one pair of sex chromosomes.
How many chromosomes are there in each stage of mitosis in Drosophila?
The fruit fly, Drosophila melanogaster, has a total of eight chromosomes (four pairs) in each of its somatic cells. Somatic cells are all cells of the body except those that will divide to form the gametes (ova or sperm). Review the events that occur in the various stages of mitosis.
What is the purpose of amplification?
Amplification provides more information in order to strengthen an important point in a speech. It serves to exaggerate certain statements which can underline comedic or serious intentions. It emphasizes the persuasive aspects of an argument by elaborating why exactly they should be considered.
How gene amplification is done?
Various ways by which gene amplification is done artificially are as follows:
- Polymerase chain reaction (PCR) – Polymerase chain reaction or PCR is commonly used to produce multiple copies of the desired gene in the lab.
- Ligase chain reaction (LCR) – Ligase chain reaction or LCR is also a method of gene amplification.
