A Drosophila Researcher Recently Isolated a Number of Mutant Fruit

question 23

Essay

A Drosophila researcher recently isolated a number of mutant fruit flies.The phenotype of each mutant is described below (i-iv).For each mutant,describe the type of gene (maternal-effect gene,gap gene,segment-polarity gene,or homeotic gene)that was most likely the cause of the altered phenotype.
(i)Homozygous mutant females appear phenotypically normal but produce larvae that have two posterior ends.
(ii)The flies contain four wings rather than two.
(iii)The wings are oriented backward.
(iv)The flies are missing two pairs of legs due to a shortened thoracic region.

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Definitions:

Visceral Pain

A type of pain that originates from the internal organs, often described as a deep, aching, or gnawing sensation.

Cholecystitis

Inflammation of the gallbladder, often due to gallstones blocking the ducts.

Hip Fracture

A break in the upper part of the femur (thigh bone) near the hip joint, often caused by falls or impacts, predominantly affecting older adults.

Vital Signs

Basic body functions measured to assess the most immediate aspects of a patient's health, including temperature, pulse, respiration, and blood pressure.