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- What phenotypes do you think a homozygous tra1hsn animal with a gain of function mutation in the Egl1 would have.In a particular strain of Neurospora, a poky mutation exhibits biparental inheritance, whereas poky mutations in other strains are inherited only from the maternal parent. Explain these results.Fragile-X syndrome causes the most common form of inherited intellectual disability. What is the chromosomal abnormality associated with this disorder? What is the phenotype of this disorder?
- "CG islands are thought to have arisen during evolution because they were associated with portions of the genome that remained unmethylated in the germ line" is true or false.Determine the correspondence of the gene X and gene Y to the mutant gene causing Trp-phenotype.When an embryo is homozygous mutant for the gap gene Kr, the fourth and fifth stripes of the pair-rule gene ftz (counting from the anterior end) do not form normally. When the gap gene kni is mutant, the fifth and sixth ftz stripes do not form normally. Explain these results in regard to how segment number is established in the embryo
- Include a description as to why disrupting the expression of each gene leads to the phenotype observed of C.Elegans bli-1, dpy-10, rol-6, unc-22, egl-1 and pos-1. In Drosophila melanogaster many eye color mutations are known. One such recessive mutation is called brown (bw) and gives brown eyes instead of the wild type dark red eyes. Another recessive mutation is scarlet (st) which gives bright red eyes. The bw st double mutant has white eyes. A brown-eyed male was crossed to a scarlet- eyed female. The F1 progeny were wildtype. When the F1 males were test-crossed to bw/bw st/st females the following progeny phenotypes were produced: 1/4 wildtype, 1/4 brown, 1/4 scarlet, 1/4 white. These results show that the two genes are? Select all that apply a)linked and 25cM apart b)sex linked c)linked d)assorting independently Please answer asap and in short and content should not be palgarised please answerDrosophila females heterozygous for three recessive mutations, a, b, and c , were crossed to males homozygous for all three mutations.The cross yielded the following results: in the image Q. Construct a linkage map showing the correct order of these genes and estimate the distances between them.
- A maternal effect gene in Drosophila, called torso, is found as a recessive allele that prevents the correct development of anterior- and posterior-most structures. A wild-type (homozygous) male iscrossed to a female of unknown genotype. This mating produces 100% larva that are missing theiranterior- and posterior-most structures and therefore die during early development. What is the genotype and phenotype of the female fly in this cross? What are the genotypes andphenotypes of the female fly’s parents? Show COMPLETE cross. Maternal genotype:Paternal genotype:F1 genotype:F1 phenotype:Explain hoxA3 and HoxD3 genes are nearly equivalent yet they play distinct roles in the development of mouse.In Drosophila subobscura, the presence of a recessive gene called grandchildless (gs) causes the offspring of homozygous females, but not those of homozygous males, to be sterile. Can you offer an explanation as to why females and not males are affected by the mutant gene?