What are Sex Linked Traits?
Sex linked traits are genetic characteristics that are determined by genes located on the sex chromosomes. Sex linked genetic disorders occur when there is a genetic mutation on a gene located within a sex chromosome.
LESSON OVERVIEW (SPECIFIC EXPECTATIONS: D1.2, D2.1, D3.4)
Lesson Hook:
The following video courtesy of Youtube is a great way to introduce the concept of sex linked genetic disorders from the viewpoint of the mother of a child diagnosed with Turner's Syndrome. It also introduces typical options available to families which can make for a good segway or introduction into the topics of genetic testing and genetic pre-screening options.
Sex linked traits are genetic characteristics that are determined by genes located on the sex chromosomes. Sex linked genetic disorders occur when there is a genetic mutation on a gene located within a sex chromosome.
LESSON OVERVIEW (SPECIFIC EXPECTATIONS: D1.2, D2.1, D3.4)
Lesson Hook:
The following video courtesy of Youtube is a great way to introduce the concept of sex linked genetic disorders from the viewpoint of the mother of a child diagnosed with Turner's Syndrome. It also introduces typical options available to families which can make for a good segway or introduction into the topics of genetic testing and genetic pre-screening options.
Pedagogy:
At this point, students should be comfortable analyzing karyotypes and as such, a brief discussion of specific types of sex linked genetic disorders should be sufficient enough to introduce this subset of genetic disorders.
However, given that this can be thought of as the final lesson in the major topic of genetic disorders, it may be a good idea to recap all genetic disorders and their corresponding karyotypes before moving on to examining genetic testing, in order to check for student understanding. In terms of assessment, it could take the form of a test, or as a group, paired, or individual assignment. Click below to download a complete karyotype lab courtesy of the Newfoundland and Labrador Government of Education that can be used to assess student understanding. It comes complete with summarizing questions and teacher answer key.
At this point, students should be comfortable analyzing karyotypes and as such, a brief discussion of specific types of sex linked genetic disorders should be sufficient enough to introduce this subset of genetic disorders.
However, given that this can be thought of as the final lesson in the major topic of genetic disorders, it may be a good idea to recap all genetic disorders and their corresponding karyotypes before moving on to examining genetic testing, in order to check for student understanding. In terms of assessment, it could take the form of a test, or as a group, paired, or individual assignment. Click below to download a complete karyotype lab courtesy of the Newfoundland and Labrador Government of Education that can be used to assess student understanding. It comes complete with summarizing questions and teacher answer key.
Complete Karyotype Lab | |
File Size: | 484 kb |
File Type: |
Debrief
The following video courtesy of Youtube can be used to not only consolidate the topic of sex linked genetic disorders, but also to introduce some of the social justice issues and corresponding activism currently occurring regarding the topics of gender determination and discrimination. Click below to view "Project 47XXY"
The following video courtesy of Youtube can be used to not only consolidate the topic of sex linked genetic disorders, but also to introduce some of the social justice issues and corresponding activism currently occurring regarding the topics of gender determination and discrimination. Click below to view "Project 47XXY"
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