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You have a population of horses that have the wild type genotype for fur color, tan....

You have a population of horses that have the wild type genotype for fur color, tan. However, when you look at the expressed phenotype, only 326 horses out of 500 are tan. What is this phenomena called? What is the value for this phenomena in this population of horses?

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Answer #1

Answer: Penetrance
Explanation:
The phenotype of an individual is determined by both its genotype and environment.
Penetrance refers to the extent a given phenotype is expressed in a group of individuals carrying the given genotype.
If all the individuals exhibit the phenotype with respect to the genotype, the allele is said to be completely penetrant.
If all the individuals do not exhibit the phenotype with respect to the genotype, the allele is said to be incompletely penetrant.

In the given case,
Number individuals with genotype = 500
Number individuals expressing the phenotype = 326
Penetrance = (326/500) X 100
= 65.2%


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