Welcome to Module 7

Welcome to Week 7.

In Chapter 9, we will explore the Patterns of Inheritance. Please review the module learning outcomes as a study guide for the quiz and final examination.

For this week's assignments you will complete your Mastering reading, homework, Dynamic Study Module, and two interactive lab Genetics. Please review the syllabus for the due dates.

As always, if you have any questions, please do not hesitate to contact me.

Sincerely,

Dr. Burke

Module Learning Outcomes

Upon successful completion of this module, you will be able to:

Mendel’s Laws

9.1 Describe the theory of pangenes and the blending hypothesis. Explain why both ideas are now rejected.

9.2 Explain why Mendel’s decision to work with peas was a good choice. Define and distinguish between true-breeding organisms, hybrids, the P generation, the F₁ generation, and the F₂ generation.

9.3 Define and distinguish between the following pairs of terms: homozygous and heterozygous; dominant allele and recessive allele; genotype and phenotype.

9.3 Describe a Punnett square and explain how it is used.

9.3 Explain how Mendel’s law of segregation describes the inheritance of a single characteristic.

9.4 Describe the genetic relationships between homologous chromosomes.

9.5 Distinguish between a monohybrid and dihybrid cross.

9.5 Explain how Mendel’s law of independent assortment applies to a dihybrid cross. Illustrate this law with examples from Labrador retrievers and Mendel’s work with peas.

9.6 Explain how a testcross is performed to determine unknown genotypes.

9.7 Explain how and when the rule of multiplication and the rule of addition are used to determine the probability of an event. Explain why Mendel was wise to use large sample sizes in his studies.

9.8 Explain how family pedigrees can help determine the inheritance of many human traits.

9.9 Explain how recessive and dominant disorders are inherited. Provide examples of each.

9.10 Compare the health risks, advantages, and disadvantages of the following forms of fetal testing: amniocentesis, chorionic villus sampling, and ultrasound imaging. Describe the ethical dilemmas created by advances in biotechnology discussed in this chapter.

Variations on Mendel’s Laws

9.11–9.15 Describe the inheritance patterns of complete dominance incomplete dominance, multiple alleles, codominance, pleiotropy, and polygenic inheritance. Provide examples of each.

9.13 Explain how the sickle-cell allele can be adaptive.

9.14–9.15 Explain why human skin coloration is not sufficiently explained by polygenic inheritance.

The Chromosomal Basis of Inheritance

9.16 Define the chromosome theory of inheritance. Explain the chromosomal basis of the laws of segregation and independent assortment.

9.17 Explain how linked genes are inherited differently from nonlinked genes.

9.18 Describe Morgan’s studies of crossing over in fruit flies. Explain how crossing over produces new combinations of alleles.

9.19 Explain how Sturtevant created linkage maps.

Sex Chromosomes and Sex-Linked Genes

9.20 Explain how sex is genetically determined in humans and the significance of the SRY gene. Compare the sex determination system in humans to those in fruit flies, grasshoppers, birds, ants, and bees.

9.21–9.22 Describe patterns of sex-linked inheritance, noting examples in fruit flies and humans.

9.22 Explain why human sex-linked disorders affect mostly males.

9.23 Explain how the Y chromosome can be used to trace human ancestry.

(CLO = Course Learning Outcome)

To Do

Please read/watch all of the module learning materials (readings, presentations, videos, etc.) and complete all assignments/assessments listed below. If you have questions, please contact the course instructor or ask in the Questions About This Course forum.

Please list any readings, presentations, videos, and assignments/assessments that students are required to do during this module. Please add links to any instructional materials as needed.

Readings and Presentations:

See above. Check your Canvas email for Chapter 9 PowerPoints.

Videos:

Helpful videos are in the weekly assignments.

Assignments/Assessments:

See above.

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