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1

Prenatal stages

Three trimesters

9 months

2

Childhood adolescence

Infancy 2 months-3 years

Postweaning 3-7 yrs

Juvenile: girls 7-10/ boys 7-12

Puberty at the end of juvenile years

Adolescence 5-10 years after puberty

3

Adulthood

Reproductive period

Women: 20-50 years

Men: 20-70 years

4

Menopause

Around age 50

The end of menstruation in women

5

Senescence

Decline physiological functioning usually associated with aging

50+

6

Pleiotropic genes

Genes that have more than one effect

Genes that have different effects at different times in the life cycle

7

Life history theory

Seeks to understand the impact of natural selection on life cycles

8

The adolescent stage is present in ?

Humans only

9

A long period of female post reproductive time is found in ?

Humans

10

Menarche

Females first menstruation

11

Approximately how long do chimpanzees, gorillas, and women in foraging societies nurse their infants?

3 -4 years

12

What does the grandmother hypothesis propose to explain?

The existence of menopause

13

Telomere hypothesis

Proposes to explain senescence that cells that dive throughout the life course have shortened DNA sequences at the end of the chromosomes

14

The age of onset of menarche is affected by ?

Telomerase

15

At birth the human brain is approximately what percent of its adult size?

25 %

16

The human brain reaches 95% of its adult size by what age?

10 years