Photo AI
As part of an independent research project, a student studied a genetic condition suffered by members of his family - HSC - SSCE Biology - Question 17 - 2009 - Paper 1
Question 17
As part of an independent research project, a student studied a genetic condition suffered by members of his family. The student wrote the following summary: - I am... show full transcript
Worked Solution & Example Answer:As part of an independent research project, a student studied a genetic condition suffered by members of his family - HSC - SSCE Biology - Question 17 - 2009 - Paper 1
Step 1
Why are diagrams, such as pedigrees, useful in analysing data?
Answer
Diagrams like pedigrees are useful in analyzing data as they visually represent family relationships and genetic connections. They help to easily identify affected individuals, inheritance patterns, and can illustrate the transmission of genetic conditions through generations, thereby allowing researchers and medical professionals to assess risk factors and make informed decisions regarding genetic counseling.
Step 2
Assess the validity of the student’s conclusion.
Answer
The student's conclusion that the condition must be sex-linked because only males are affected is not entirely valid. While sex-linked conditions often affect males more frequently, it does not rule out the possibility of autosomal conditions or other inheritance patterns. Further genetic analysis would be necessary to determine the exact inheritance mechanism. Additionally, the pedigree suggests that the condition could also be influenced by factors such as carrier females or incomplete penetrance, emphasizing the need for a more comprehensive assessment.