Genotypes are the genes of an organism with alleles represented by letters of the alphabet. Phenotypes are an organism's observable inherited characteristics. True or False?

True

Explanation:

This is correct for both Genotypes and Phenotypes.

True

Explanation:

Genotype is been represented by the letters of a certain gene

and Phenotype is the physical look of an organism

this age may represent the age of the earth's accretion, of core formation, or of the material from which the earth formed. this dating is based on evidence from radiometric age-dating of meteorite material and is consistent with the radiometric ages of the oldest-known terrestrial and lunar samples.