What is the name given to an observable characteristic of an organism?

a
phenotype
b
mutation
c
genome
d
genotype

a. phenotype

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How did the Japanese imperial court system of appointing government officials lead to the rise of the Fujiwara family?
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The correct answer is b) phenotype.

To arrive at this answer, we can start by understanding the terms that are given as options.

a) The term "a" is not a commonly used term to describe an observable characteristic of an organism, so it can be eliminated as a possible answer.

b) "Mutation" refers to a permanent change in the DNA sequence of an organism. While mutations can lead to changes in the phenotype, it is not specifically used to describe an observable characteristic itself. Therefore, it is not the correct answer.

c) "Genome" refers to the complete set of DNA in an organism, which includes all the genes and non-coding regions. The genome contains the genetic information, but it does not refer specifically to an observable characteristic, so it can be eliminated as a possible answer.

d) "Genotype" refers to the genetic makeup of an organism. It is the collection of genes that an organism inherits from its parents. While the genotype plays a role in determining an organism's observable characteristics, it is not the name given to the observable characteristic itself.

Therefore, the correct answer is b) phenotype. Phenotype refers to the observable characteristics of an organism, such as its physical appearance, behavior, and other traits that can be directly observed or measured.