ans002 fall 2012. reproduction reproduction is the biological process by which new...

FERTILISATION

ANS002

Fall 2012

REPRODUCTIONReproduction is the biological process by which new

"offspring" are produced from their "parents”

Two main types: sexual and asexual

Sexual reproduction typically requires the involvement of two gametes, one each from opposite type of sex

REPRODUCTION

Why is it important?

FERTILISATION

Fertilisation is the fusion of gametes to

produce a new organism.

Sperm – male gamete

Motility Sperm provides half of the

genome for an offspring

Source: http://www.art.com/products/p357047991-sa-i4006854/david-phillips-human-sperm-or-spermatozoa-showing-the-heads-midpieces-and-long-flagella-sem.htm

Hormone of male reproduction

Testosteron

Oocyte – Female gameteProvides:half of the genomenutrition, other factors needed for development

Source: http://www.ansci.wisc.edu/jjp1/ansci_repro/lab/lab10/maturation3.html

Hormone of female reproductionFollicle stimulating

hormone - FSHLuteinizing hormone – LHIn accordance with ovary

cycle, menstrual cycleImportant in assisted

reproductive technology

FERTILISATIONFertilisation is the

fusion of gametes to produce a new

organism.

The human oocyte at the moment of fertilization.Image: National Museum of Health and Medicine

One and only one sperm can penetrate and fertilize with the oocyte

Development stages

Development of the Preimplantation Blastocyst in Humans.(© 2001 Terese Winslow)

http://www.sciencephoto.com/image/290575/large/M8150307-Newborn_baby_after_Caesarean-SPL.jpg

Welcome to the world!!!

Short animated video of human fertilization process

Remember quiz on next class