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:

Former Vice President

A title referring to someone who once served as the deputy head of state or government, assisting the president.

Fulfillment

The achievement of something desired, promised, or predicted; satisfaction or realization of a need or desire.

Wish

A desire or hope for something to happen or be the case, often without an expectation of actual realization.

Rapid Eye Movements

Quick movements of the eyes that occur during certain stages of sleep, particularly REM sleep, which is associated with dreaming.