Study resource
Reproduction exam tips
Study Reproduction with curriculum-aligned Exam Tips resources, practice links, and exam-focused support.
At a glance
exam tips
Resource type
Topic
Reproduction
Exam tips
Practice Genetic Crosses
Regularly practice carrying out genetic crosses using Punnett squares to show sex inheritance.
This helps reinforce your understanding of how sex is determined genetically and improves your ability to predict outcomes in exam scenarios.
Explain the DNA vs genes boundary in Sex determination
Explain use direct proportion and simple ratios in sex-determination genetic crosses by naming Sex determination, then make the boundary explicit: DNA is the molecule; a gene is a functional section of that molecule.
This prevents a generic Unit 4.6 answer and keeps the response aligned with Reproduction, especially where DNA vs genes concepts overlap.
Related topics