For Questions 15-18 The allele b gives Drosophila a black body, and b gives brown (the...
For Questions 15-18 The allele b gives Drosophila a black body, and b+ gives brown (the wildtype). The allele wx of a second gene gives waxy wings and wx* gives nonwaxy wings (the wildtype). The allele en of a third gene gives cinnabar eyes and cngives red (the wildtype). A female heterozygous for these three genes is testcrossed and 1000 progeny are classified as followst b, wx, en 389 b, wx, en 379 bt, wx, cn b, wx, en 67...
Questions 10 and 11 please (10.-11.) The allele b gives Drosophila flies a black body and bt gives brown, the wild-type phenotype. The allele wx of a separate gene gives waxy wings and wx+ gives non-waxy, the wild-type phenotype. The allele cn of a third gene gives cinnabar eyes and cnt gives red, the wild-type phenotype. A female heterozygous for these three genes is testcrossed, and 1000 progeny are classified as follows: 382 cinnabar 379 black, waxy 69 waxy, cinnabar...
2. The allele b gives Drosophila flies a black body, and bt gives brown, the wild-type phenotype. The allele wx of a separate gene gives waxy wings, and wx+ gives nonwaxy, the wild-type phenotype. The allele cn of a third gene gives cinnabar eyes, and cn* gives red, the wild-type phenotype. A female heterozygous for these three genes is testcrossed, and 1000 progeny are classified as follows: 5 wild type, 6 black waxy cinnabar, 69 waxy cinnabar, 67 black, 382...
Can you please help me with this problem: 3. The allele b gives Drosophila flies a black body, and b+ gives brown, the wild type phenotype. The allele wx of a separate gene gives waxy wings, and wx+ gives nonwaxy, the wild type phenotype. The allele cn of a third gene gives cinnabar eyes, and cn+ gives red, the wild-type phenotype. A female heterozygous for these three genes is testcrossed, and 1000 progeny are classified as follows: 5 wild type;...
Question 5 (14 marks) The allele cn gives fruit flies cinnabar eyes, whereas the allele cn gives red, the wild-type phenotype. The allele wx of a separate allele gives waxy wings, and wx gives non-waxy wings (wild-type). The allele b of a third gene gives fruit flies a black body, whereas the allele b gives a brown (wild-type) body colour. A geneticist knows these three genes are on the same chromosome, but does not know what order the genes are...
The allele se gives Drosophila a sepia body and se+ gives brown, the wild-type phenotype. The allele ro of a separate gene gives rough eyes and ro+ gives smooth eyes, the wild-type phenotype. The allele ss of a third gene gives flies without thorax spines and ss+ gives flies with thorax spines, the wild-type phenotype. When females heterozygous for each of these genes were testcrossed with sepia, rough, spineless males, the following classes and numbers of progeny were obtained: wild...
the fruit fly, Drosophila melanogaster, an allele (v) of the gene vermillion gives flies purple eyes and is recessive to the wildtype red eye color (v+). An allele y of the yellow gene, gives flies a yellow body color compared to the dominant brown body color (yt). A heterozygous females for the two different mutations is test-crossed with mutant (i.e., homozygous recessive) males. The phenotypes of the progeny of this cross and their corresponding numbers are given below Yellow body,...
In Drosophila, the genes for black (b) body and curved (c) wings are linked on the same chromosome. The frequency of recombination between b---c is 0.276. How many recombinant offspring would be expected if 2000 progeny were produced from a testcross between a female heterozygous for both genes and a homozygous recessive male?
In Drosophila, b+ is the allele for normal body color and at the same gene b is the allele for black body color. A second gene controls wing shape. The shape can be either normal (vg+) or vestigial (vg). A cross is made between a homozygous wild type fly and fly with black body and vestigial wings. The offspring were then mated to black body, vestigial winged flies. The following segregation ratio was observed: Phenotype # Observed Wild Type (normal,...
2. In a testcross of a female Drosophila heterozygous for three linked recessive genes, the following phenotypes of progeny were obtained: 442 435 at bt d a bd at bd a bt d at bd a bt di at bt dt a bd Total ONEN 1000 A) Write out the parental genotype of the heterozygous parent indicating the correct allele configuration and gene order B) Construct a map of the genes and indicate the map-distances based on the data shown...