Reproduction BIO 201: Organismal S&F Dr. Tony Serino Misericordia Univ. Biology Dept. Asexual Reproduction
Generation of new individuals Budding without union of gametes Fission separation of parent into two
individuals (invertebrates) Budding outgrowth of a new individual from an existing one (invertebrates) Fission Fragmentation and Regeneration breaking body of parent into several pieces and then regrowth of each into functional organism (invertebrates) Parthenogenesis an unfertilized egg
develops into an adult (invertebrates and Parthenogenesis vertebrates) Sexual Reproduction Production of sex cells (gametes) that fuse to begin forming a new individual Most animals have cyclic reproduction
activity that correspond to favorable environmental conditions for raising offspring Controlled by hormones that vary with day length, season, temperature, rainfall and.or lunar cycles Sexual Pattern Variations
Hermaphroditism an individual with functional male and female sexual anatomy. Usually encounters results in both individuals being insemintated, but in some cases an individual may mate with itself Sex Reversal some species living in a same sex environment can change from one sex to another (crocs, some fish, etc.); other animals switch sex to increase their chances in
contributing to the next generation (some oysters) Wrasse undergoes sex reversal External Fertilization Reproduction System
Functions: Survival of species Production of sex cells (gametes) Transport the gametes toward each other Allow gametes to meet (fertilization) Promote the generation, maintenance and rearing of progeny Gonads:
undergo Meiosis to produce gametes Meiosis (divided into Meiosis I and II) Meiosis I Assorts chromosomes by homologous pairs Then separates the pairs randomly Reduces the number of chromosomes by half; Diploid to Haploid (2n n) Meiosis II
Separates sister chromatids Progeny cells now have one DNA per chromosome Male Reproduction Gonads: Testis Gamete: Spermatozoa (sperm) Duct system: to store and transport sperm from gonad to external environment Supporting structures:
Allow sperm maturation Allow survival of sperm in ext. environment Deposit sperm into female vagina Sensory functions
Male Reproductive Anatomy Spermatogenesis Male Hormones
Female Reproduction Gonad: Ovary Gametes: Ova Duct System: Transport ovum from ovary to uterus
Site of fertilization; Receive and transport sperm to ovum Capacitate sperm
House and support fetus Deliver fetus Supporting Structures Sensory and protective functions Female Anatomy (oviduct or Fallopian tube)
Vulva Oogenesis * * First polar body may not divide to form others.
Development of Ovum and Follicle Ovulation Secondary oocyte Zona Pellucida Corona Radiata Oviduct (Uterine or Fallopian tube)
Ampulla Isthmus Functions: transportation of ovum, sperm and zygote -capacitation of sperm -site of fertilization Uterus: houses and supports fetus
Revamping the Value Chain to Lower Cost . Through redesigning the company's value chain system it can develop a large cost advantage. Eliminating costly work steps. Bypass certain cost-producing value chain activities. Important revamping activities include: Selling to direct customers...
Learning Goals: Define integrity and understand its importance to small businesses.. Explain how integrity applies to various stakeholder groups. Identify some common challenges and benefits of maintaining integrity in small businesses.
Oxymoron An Oxymoron is a figure of speech that is a combination of seemingly contradictory words. Examples: Same difference Pretty ugly Roaring silence Personification Personification is a figure of speech in which an animal, object, force of nature, or idea...
KEY CONCEPT A cell's life consists of a repeating pattern of events called the cell cycle. Cell Cycle Events include: Growth Carrying out is job DNA and organelle duplication Division The Cell Cycle is divided into two main stages: Interphase...
Situar al paciente en decúbito supino Si es la tibia proximal colocar una almohadilla debajo de la rodilla, flexionando la pierna 30 grados Limitar el área con campos estériles y limpiar la zona con antiséptico Infiltrar analgésico Ajustar la longitud...
More Information on Calcium More Info. on Calcium Form taken up by plants Ca+2 Mobility in Soil No, slight mobility in soil solution Mobility in plant Movement occurs in xylem to the leaves (one way ticket) More Info. on Calcium...
Ready to download the document? Go ahead and hit continue!