CAIE IGCSE Biology EXTENDED 17.4.16 Sex-linked characteristic as a feature
CAIE IGCSE Biology EXTENDED 17.4.16 Sex-linked characteristic as a feature
Practise explaining sex-linked inheritance using X and Y chromosomes, carrier females, affected males and pedigree evidence for conditions such as colour blindness.
How this is tested
- describe a sex-linked characteristic as a gene on a sex chromosome with unequal sex incidence
- use X-linked genotypes to identify affected males, carrier females and unaffected people
- explain pedigree evidence showing that a female has passed on a recessive X-linked allele