What This Document Is
This document contains in-class activities and practice questions for Week 4 of BIO 244, Genetics I at Drexel University. It focuses on sex determination, sex-linked traits, and chromosome abnormalities. The activities are designed to be completed during class time, likely as individual or group work, to reinforce key concepts.
Why This Document Matters
This resource is essential for students currently enrolled in Drexel’s BIO 244. It provides opportunities to apply lecture material to specific problems, helping to solidify understanding of complex genetic principles. These in-class activities likely contribute to a portion of the overall course grade and are valuable preparation for exams. It’s most useful *during* Week 4, as a companion to lectures and readings on sex determination and inheritance patterns.
Common Limitations or Challenges
This document is not a substitute for attending lectures or completing assigned readings. It provides practice, but doesn’t introduce core concepts. It also doesn’t include detailed explanations of the answers – the intention is for students to work through the problems and learn by doing, potentially with instructor guidance.
What This Document Provides
The full document includes:
* Multiple-choice questions testing understanding of heterogametic vs. homogametic sex determination.
* Problems calculating the number of Barr bodies in individuals with various chromosomal abnormalities (Klinefelter syndrome, Turner syndrome, Triple X, etc.).
* A genetics problem involving red-green colorblindness, requiring determination of parental genotypes and phenotypes.
* Scenarios exploring the impact of SRY gene presence/absence on phenotypic sex.
* A complex Drosophila genetics problem involving X-linked and autosomal traits, requiring the use of Punnett squares and probability calculations to determine F2 phenotypic ratios.
This preview does *not* include solutions to the problems, detailed explanations of the concepts, or the full worked-out solutions for the Drosophila cross.
