Achromatopsia is an inherited eye condition.
It is caused by a gene mutation that produces a recessive allele.
The condition causes cone cells in the retina to become damaged or non-functional.
Explain the meaning of these genetic terms:
Two parents who are heterozygous for achromatopsia are expecting a child. Draw a genetic diagram to calculate the probability that the child will have the condition. Use A A\,A for the normal allele and a a\,a for the allele for achromatopsia.
Individuals with complete achromatopsia have normal vision in dim light but cannot perceive colours. Explain why.
Explain why stem cells could be used as a treatment for this condition.
Why is it an advantage to use stem cells harvested from the patient rather than from another person?