PATHOLOGY

Detailed explanation-1: -A mutation in the gene for body color can produce flies with an ebony body color. A homozygous normal fruit fly (e+e+) is crossed with a homozygous ebony fruit fly (ee). What is the predicted outcome of this genetic cross? All the offspring will have brownish-yellow bodies.

Detailed explanation-2: -In fruit flies, red eyes is a dominant allele located on the X chromosome. The recessive condition results in white eyes. The tan body trait is also X-linked and is dominant to yellow bodies.

Detailed explanation-3: -Some common mutations seen in fruit flies include wing structure and eye color variations. Mutant wings may be short or backward. Fruit flies are known for their red eyes, although mutations cause certain specimens to have golden or white eyes. Mutations also sometimes result in eyeless flies.

Detailed explanation-4: -In fruit flies, the gene for body color has two different alleles: the black allele and the brown allele. Moreover, brown body color is the dominant phenotype, and black body color is the recessive phenotype.

Detailed explanation-5: -Yellow body color in Drosophila is an x-linked characteristic that is recessive to gray body-color (Drosophila females are xx and males XY as in humans). A gray female mated with an unknown male and produced some yellow and some gray offspring of both sexes.