n Drosophila melanogaster, black body (b) is recessive to gray body (b+), purple eyes (pr) are recessive to red eyes (pr+), and vestigial wings (vg) are recessive to normal wings (vg+). The loci encoding these traits are linked, with the following map distances:b and pr:          6 mupr and vg:        13 mupr lies in the middle of b and vgThe interference among these genes is 0.5.A fly with a black body, purple eyes and vestigial wings is crossed with a fly homozygous for a gray body, red eyes and normal wings. The female progeny are then crossed with males that have a black body, purple eyes and vestigial wings. If 1000 progeny are produced from this test cross, what will be the phenotypes and proportions of the progeny?

Consider linked genes between body colour and eye colour of a fly. The golden bodied red eyed are normal ones whereas whereas grey bodied grey color eyed are double mutant ones. What is the phenotype with which the female fly was crossed to produce the four offspring?

In fruit flies, having red eyes is dominant to white eyes. In a specific scientific cross, a heterozygous red-eyed fly is crossed with another heterozygous red-eyed fly.Fruit Fly (Drosophila immigrans) by Martin Cooper (CC BY 2.0)What percentage of their offspring will have white eyes?Elimination ToolSelect one answerA0%0%B25%25%C50%50%D75%75%

Genes that code for proteins involved in organelle biogenesis and intracellular trafficking produce products that are critical in normal cell function . Conserved orthologs of these are present in most or all eukaryotes, including Drosophila melanogaster. Some of these genes were originally identified as eye color mutants with decreases in both types of pigments found in the fly eye. These criteria were used for identification of such genes, four eye color mutations that are not annotated in the genome sequence: chocolate, maroon, mahogany, and red Malpighian tubules were molecularly mapped and their genome sequences have been evaluated. Mapping was performed using deletion analysis and complementation tests. chocolate is an allele of the VhaAC39-1 gene, which is an ortholog of the Vacuolar H+ ATPase AC39 subunit 1. maroon corresponds to the Vps16A gene and its product is part of the HOPS complex, which participates in transport and organelle fusion. red Malpighian tubule is the CG12207 gene, which encodes a protein of unknown function that includes a LysM domain. mahogany is the CG13646 gene, which is predicted to be an amino acid transporter. The strategy of identifying eye color genes based on perturbations in quantities of both types of eye color pigments has proven useful in identifying proteins involved in trafficking and biogenesis of lysosome-related organelles. Mutants of these genes can form the basis of valuable in vivo models to understand these processes.

In fruit flies, the gene for red eyes(R) is dominant over the gene for white eyes(r) and is sex linked. If a true breeding red eyed male, all the offspring are red eyed. However, if a true breeding white eye breeding white eye female is mated with a red eyed male, all the offspring will be white eyed. Explain this apparent contradiction using genetic cross

In a single population, silver flies show a variety of different wing colours: blue wings, green wings, silver wings, gold wings and clear wings. If wing colour is controlled by the same gene, these colours represent different: Question 5Answer a. Alleles b. Wildtypes c. Chromosomes d. Antibodies e. Loci