bio q (1 Viewer)

[zizi2003_]

so for this question, im guessing the answer is C? even then, does crossing over even happen between the X and Y chromosomes in meiosis? since both arent even homologous and Y chromosome contains fewer genes?
what do u guys think is the answer?

 

[hiiitsme]

agreed with C, not because i knew that but just eliminating all others

 

[jimmysmith560]

Just confirming that the answer is indeed (C). This question appeared in the James Ruse Agricultural High School 2010 Biology trial exam.

 

[Eagle Mum]

The X and Y chromosomes have homologous sequences called pseudoautosomal regions(PAR1, PAR2 and PAR3) and crossing over is restricted to these regions.

The existence of these regions turns this MCQ into one which can potentially handicap someone who has additional knowledge.

 

[zizi2003_]

The existence of these regions turns this MCQ into one which can potentially handicap someone who has additional knowledge.

so...
NESA wants us to study but not over-study

 

[Eagle Mum]

This isn't NESA, this is James ruse and they always tend to post questions that go beyond the syllabus.

My main point, though, is that questions can be challenging, but shouldn't be ambiguous, to avoid penalizing students for gaining knowledge. Option C isn't truly correct.