neoteny - of ancestors become adult features of...

Info iconThis preview shows pages 1–15. Sign up to view the full content.

View Full Document Right Arrow Icon
Physical Growth and Development Evolutionary rates of growth and development Neoteny Hypermorphisim
Background image of page 1

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Physical Growth and Development Unusual human characteristics Mid and adolescent growth spurt Secondarily altricial offspring Shortened lacatation and early weaning Short interbirth intervals Unusual secondary sexual characteristics (hair, fat) Menopause Did these unusual traits arise as a package or as a mosaic?
Background image of page 2
Physical Growth and Development Life history theory 2 decades of infancy, childhood, juvenile, and adolescent stages Advantages Extended period of brain development Time for acquisition of skills Time for socialization, play, and development of complex culture Big relative brain size Complex culture Unique life history
Background image of page 3

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Life cycle evolution Change the timing of life history periods Introduce or delete periods
Background image of page 4
Heterochrony Changes in the relative time of appearance and rate of development for characters already present in ancestors. Neoteny Rates of development slow down and juvenile stages
Background image of page 5

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 6
Background image of page 7

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 8
Background image of page 9

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 10
Background image of page 11

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 12
Background image of page 13

Info iconThis preview has intentionally blurred sections. Sign up to view the full version.

View Full DocumentRight Arrow Icon
Background image of page 14
Background image of page 15
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: of ancestors become adult features of descendants. Hypermorphosis An extension of the growth and development period of the descendant beyond that of the ancestor. Neoteny is a slowing down of the rate of development. Adult descendants retain immature body shape of ancestor Hypermorphsis is a prolongation of the time for development. Produces descendants that are hypermature compared to ancestor. Can any one factor model explain human evolution? Physical Growth and development Are there new stages in the human growth pattern? Cranial base growth Brain gyrification and sulcul patterns Basicranial flexion and speech allometry Physical Growth and development allometry Physical Growth and development Critiques Humans go through all life stages from embryo to adulthood. Both length and rates of growth in humans differ from other primates....
View Full Document

Page1 / 15

neoteny - of ancestors become adult features of...

This preview shows document pages 1 - 15. Sign up to view the full document.

View Full Document Right Arrow Icon
Ask a homework question - tutors are online