The Genes for Zeste Eyes and Forked Bristles Are Located

question 33

Essay

The genes for zeste eyes and forked bristles are located on the X chromosome in Drosophila melanogaster.Both genes are recessive.A cross is made between a zeste-eyed female and a forked-bristled male.
a) If 200 offspring from this cross were obtained,present the expected number,sex,genotype,and phenotype in each class of the F₁.
b) If the F₁ offspring were crossed to produce 800 flies of an F₂ generation,present the expected number,sex,and phenotype in each class.Assume no crossing over.

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Definitions:

First World War

A global conflict that lasted from 1914 to 1918, involving many of the world's nations, including all of the great powers, eventually forming two opposing military alliances: the Allies and the Central Powers.

Ninety-Second Division

An infantry division of the United States Army that was composed entirely of African American soldiers during World War I.

Argonne-Meusse

Presumably a misspelling, likely referring to the Meuse-Argonne Offensive, a major part of the final Allied offensive of World War I that stretched along the entire Western Front.

Infantry Regiment

A military unit, typically consisting of soldiers who fight on foot.