Midterm Stats & Numbers

Life Expectancy in the early 1900s

57 years

Life Expectancy in 2021

82.60 years

Prenatal Development

Period from conception to birth

Infancy Age Range

0-2 years

Childhood Age Range

2 to 10-12 years

Adolescence Age Range

10-12 to 18-22 years

Early Adulthood Age Range

Late teens/early 20s to 45 years

Middle Adulthood Age Range

45-60 years

Late Adulthood Age Range

60 years to death

Trust vs Mistrust Stage

Infancy, according to Erikson's Psychological Theory

Autonomy vs Shame & Doubt Stage

Early Childhood, according to Erikson's Psychological Theory

Initiative vs Guilt Stage

Preschool age, according to Erikson's Psychological Theory

Industry vs Inferiority Stage

School age (6-12 years), according to Erikson's Psychological Theory

Identity vs Role Confusion Stage

Adolescence (12-18 years), according to Erikson's Psychological Theory

Intimacy vs Isolation Stage

Young adulthood (19-40 years), according to Erikson's Psychological Theory

Generativity vs Stagnation Stage

Middle adulthood (40-65 years), according to Erikson's Psychological Theory

Integrity vs Despair Stage

Maturity (65+ years), according to Erikson's Psychological Theory

Sensorimotor Stage

Birth to 2 years, according to Piaget's Stages of Cognitive Development

Preoperational Stage

2-7 years, according to Piaget's Stages of Cognitive Development

Concrete Operational Stage

7-11 years, according to Piaget's Stages of Cognitive Development

Formal Operational Stage

11+ years, according to Piaget's Stages of Cognitive Development

Simple Reflexes Substage

First month of sensorimotor stage

Primary Circular Reactions Substage

1-4 months of sensorimotor stage

Secondary Circular Reactions Substage

4-8 months of sensorimotor stage

Coordination of Secondary Circular Reactions Substage

8-12 months of sensorimotor stage

Tertiary Circular Reactions Substage

12-18 months of sensorimotor stage

Beginnings of Thought Substage

18-24 months of sensorimotor stage

Number of Genes in Cell Nucleus

25,000 genes

Chromosome Pairs in Humans

23 pairs, totaling 46 chromosomes

Genes from Mitochondria

37 genes inherited from the mother

Cystic Fibrosis Occurrence

1 in 2,000 births

PKU Occurrence

1 in 10,000 to 1 in 20,000 births

Chance of Child Developing with PKU

1/4 chance if both parents have the gene