Which statement describes how two organisms may show the same trait yet have different genotypes for that phenotype?

Answer 1

Organisms that share genotypes share the same alleles, whereas organisms that share phenotypes share expressed traits. Sometimes multiple genes code for the same phenotype, and the classical study used to illustrate this (or at least one of them) is on Mendel's experiments on plants.

Simply put, Mendel's work helped demonstrate how dominant and recessive alleles affect phenotype. When an allele is completely dominant, an organism will display the dominant phenotype whether or not it has one or two dominant alleles (assuming the alleles share the same locus). So for instance two different pea plants (this example is made up to display the concept) may have two different genotypes, one with two dominant alleles and one with a single dominant and single recessive allele; these organisms have different genotypes. However, because the dominant allele is completely dominant, both would organisms would express the same phenotype.

A perhaps more eloquent explanation of the above example exists at the Mendelian inheritance article on Wikipedia.

Answer 2

Organisms can have the same genotype at one gene locus that is subsequently modified by the genes present at another locus because the first locus is hypostatic to the second locus.

Some genes can be shutdown or expressed based on which parent is the mother/father in hybrid animals such as ligers, tigons, zorses, mules/hinnies resulting in substantial differences in phenotype even when the genotype is the same.

Color expression can be highly variable with what is ostensibly "identical" genotypes.

Animal clones with identical genotypes that have white spotting characteristics will not have identical spotting patterns.

Answer 3

The simplest answer is that a Homozygous Dominant individual and a Heterozygous Dominant individual will look the same (have the same phenotype) but have differnet genotypes.

For example: Individual 1 has an AA genotype at the agouti site and has brown hair

Individual 2 has an Aa genotype at the agouti site and has brown hair Genetically different but visually the same.

Answer 4

an organisms phenotype is its physical appearance , or visibletraits. An organisms genotype is its genetic make up, or allele combination

Answer 5

both are homozygous for the dominant trait