is this an actual part of mod 5 for bio or is it just extension stuff? my school teaches it but the in focus and pearson textbooks both have it as extension (in focus doesn't even go through it in proper detail)
NESA goes past the boundaries of their syllabus in hsc bio numerous times. It isn’t directly in the syllabus but there are various questions that are about allele frequency that take aspects of Hardy Weinberg.
It’s better to learn it than have it shock you by being on the exam. I know atomi (a learning centre) didn’t include certain specifics about the content because they believed it wasn’t part of the syllabus and wasn’t in any past hsc question. But then boom, that content they didn’t teach popped up in the 2021 hsc even though there was never any question on it before.
You have to remember that sure NESA made a syllabus, but not only is that syllabus quite broad and vague. This means that the syllabus is open for different interpretations by different people. The people who write the HSC partially changes every year, so what was once thought to be out of syllabus by the previous writers may not be by the new writers.