Using mendelian genetics, explain how two brown eyed parents can have a blue eyed child. Which of the alleles is dominant? You may use a graph to support your explanation (Tip: Assume a simple dominance and inheritance )

Given that the brown eyed parents are able to produce blue eyed offspring, it is safe to assume that they are both heterozygots for eye colour and that the brown allele is dominant (A) over the blue allele (a). With this knowlege, we can put together a Punnet square that demonstrates how two heterozygous parents with the brown eye phenotype have a 1 in 4 probability of having a blue eyed child. 

JT
Answered by Jeremy T. Biology tutor

3161 Views

See similar Biology A Level tutors

Related Biology A Level answers

All answers ▸

What are xylem and phloem in plants, and what do they do?


How do I work out the magnification of an image?


Explain the process of synaptic transmission


Why might a gene still code for a functioning enzyme after a substitution mutation to one base in the gene?


We're here to help

contact us iconContact ustelephone icon+44 (0) 203 773 6020
Facebook logoInstagram logoLinkedIn logo

MyTutor is part of the IXL family of brands:

© 2025 by IXL Learning