Which term describes an organism composed of cells from two different zygotes?

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Multiple Choice

Which term describes an organism composed of cells from two different zygotes?

Explanation:
Chimera describes an organism that contains cells from two different zygotes. When two fertilized eggs contribute cells to the same developing individual, the body ends up with two genetically distinct cell populations. This creates a mosaic of genotypes within one organism, which is exactly what a chimera is. The other terms refer to genetic variation within a single genome: heterozygous means two different alleles at one gene locus in the same genome, homozygous means two identical alleles, and wild type is the normal reference version of a trait.

Chimera describes an organism that contains cells from two different zygotes. When two fertilized eggs contribute cells to the same developing individual, the body ends up with two genetically distinct cell populations. This creates a mosaic of genotypes within one organism, which is exactly what a chimera is. The other terms refer to genetic variation within a single genome: heterozygous means two different alleles at one gene locus in the same genome, homozygous means two identical alleles, and wild type is the normal reference version of a trait.

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