The Phase in the Lifespan Known as Infancy Begins at Birth

question 19

Short Answer

The phase in the lifespan known as infancy begins at birth and ends around the ___________ birthday.

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Definitions:

Heterozygous

Inheriting from parents different forms of a gene for a given trait.

Monozygous

Pertains to monozygotic twins, twins resulting from a single fertilized egg that splits, resulting in two genetically identical individuals.

Dizygotic

Refers to twins that are fraternal, meaning they developed from two different eggs fertilized by two different sperm, resulting in genetically distinct siblings.

Monozygotic

Relating to twins who have developed from a single fertilized ovum, making them genetically identical.