In Drosophila, Singed Bristles (Sn) and Cut Wings (Ct) Are

question 84

Multiple Choice

In Drosophila, singed bristles (sn) and cut wings (ct) are both caused by recessive, X-linked alleles.The wild type alleles (sn⁺ and ct⁺) are responsible for straight bristles and intact wings, respectively.A female homozygous for sn and ct⁺ is crossed to a sn⁺ct male.The F₁ flies are interbred.The F₂ males are distributed as follows Of these 4 phenotypic classes of offspring, which of the following arose from a parental gamete produced by the F1 females?

• A)sn⁺ ct⁺ and sn⁺ ct flies
• B)sn⁺ ct⁺ flies only
• C)sn ct and sn⁺ ct⁺ flies
• D)sn⁺ ct and sn ct⁺ flies
• E)sn ct and sn ct⁺ flies

---

Definitions:

Primary Research

Original research conducted to collect data firsthand, rather than using existing data.

Corporate Website

An official online platform owned by a business or organization, designed to represent its brand, values, and offerings to the public.

Information Gaps

Situations where there is a lack of necessary information, leading to uncertainties or misunderstandings.

Formal Outline

A structured framework for organizing the main points and subpoints of a speech or written document in a hierarchical manner.