You have captured a gray squirrel and identified it as Schurus carolinensis. Explain why this animal...
You have captured a gray squirrel and identified it as Schurus carolinensis. Explain why this animal is suitable/or not suitable for genetic studies.
Homework Answers
Schurus carolinensis (gray squirrel) is suitable for genetic studies. The genetic basis of melanism can be studied.
There are three different colour coats found in Schurus carolinensis.
1. Gray colour coat - wlid type
2. Jet black colour coat phenotype
3. Brown-black colour coat phenotype
These three different morphology are observed due to varying distributions of eumelanin and phaeomelanin pigment in hairs (fur coat) and their production is regulated by the melanocortin 1 receptor (MC1R).
The gray phenotype - homozygous for the wild-type allele E+
The jet-black phenotype - homozygous for the MC1R-Δ24 allele EB
The brown–black phenotype - heterozygous for the E+ and EB alleles.
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