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Human Development

Unit 1- Growth & Development

Growth refers to quantitative changes- increase in size and structure. A person grows physically as well as mentally.
Development refers to qualitative changes

PRINCIPLES OF GROWTH AND DEVELOPMENT

1. Heredity
HEREDITY gives the human individual a similarity to the other organisms, but also a uniqueness. Characteristics of both parents are passed on to the child through the union of the father's sperm and the egg cell of the mother to form a zygote or offspring.

Genes are the submicroscopic particles in the chromosomes and the unit carriers of heredity
Genes are composed of chromosomes that determines sex of offspring.
X and y chromosomes for male, and 2 x's for female
Identical twins are the result of splitting of one zygote into 2 separate cells w/c develop into 2 individual organisms.
Fraternal twins, in contrast with the identical twins, are developed from 2 separate zygotes.
2. Maturation & Learning
Maturation is the unfolding......


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Approximate Word Count: 1760
Approximate Pages: 8 (250 words per double-spaced page)

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