Inheritance & EvolutionHigh Exam FrequencyAQAEdexcelOCRWJEC
Sex Determination
Sex chromosomes and sex determination mechanisms
What you'll cover
- X and Y chromosomes
- Sex determination in humans
- Sex-linked inheritance patterns
Study this topic
1Notes2Notes3Diagram4How It Works5Definitions6Misconceptions7Memory Aid8Higher Tier9Exam Focus10Summary11Exam Tips
Sex Chromosomes
Inheritance of Sex
Visual: Sex Determination
How It Works: XX and XY Determine Sex
Key Definitions
Common Misconceptions
Memory Aids
Higher X-Linked Inheritance and Pedigree Analysis
Exam Focus
Knowledge Organiser
Exam Tips: Sex Determination
Sample Flashcards
What determines the sex of a human being?
The father's sperm, with a 50% chance of X or Y chromosomes.
Which chromosome always passes from mother to child?
Always an X chromosome (XX)
Sample Questions
What determines the sex of a human baby?
Use a genetic diagram to show how sex is inherited in humans.
26
exam-style questions
20
revision flashcards
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