Can someone help me with this problem please? A friend of yours is a volunteer i
ID: 208375 • Letter: C
Question
Can someone help me with this problem please?
A friend of yours is a volunteer in the Peace Corps working in an area of the world that is extremely hot. Your friend has captured some interesting crème colored mice and adopted them as pets. When your friend returns to his home town in the northern Midwest in the U.S., he is surprised to find that his crème colored pet mice are now giving birth to babies that have dark brown ears and legs. Your friend knows that you are a genetics student and asks for your help to explain this phenomenon. Given that your friend is certain that no other mouse got into the cage to breed, what do you tell your friend about the genetics underlying his mouse results? What is the correct name and definition for this phenomenon? What should your friend do to get crème colored offspring?
Explanation / Answer
Both the parents have Creme coloured mice and their babies were having dark brown ears and legs. This result shows that the creme colour is dominant over dark brown colour. This relationship is called as the dominant-recessive allele relationship. Each gene has two alleles, one on each chromosome. In this relationship, one of the alleles behave as the dominant allele and another allele is the recessive allele.
Suppose we have dominant allele designated as C for creme colour and c for the brown colour.
When a dominant allele is present in CC or Cc the mouse will have creme colour but when the mouse has cc genotype then only it will have dark brown colour.
In the given case the genotype of both the creme colour mouse was Cc. So, we will get progeny which will have CC, Cc and cc genotype.
Your friend should allow to bred the parent mouse again so that he will get the mouse which will be creme in colour