• Share
  • Email
  • Embed
  • Like
  • Save
  • Private Content
Sexual Reproduction In Animals
 

Sexual Reproduction In Animals

on

  • 11,684 views

Regents Biology notes on sexual reproduction in animals

Regents Biology notes on sexual reproduction in animals

Statistics

Views

Total Views
11,684
Views on SlideShare
11,677
Embed Views
7

Actions

Likes
0
Downloads
112
Comments
1

1 Embed 7

http://www.slideshare.net 7

Accessibility

Upload Details

Uploaded via as Microsoft PowerPoint

Usage Rights

© All Rights Reserved

Report content

Flagged as inappropriate Flag as inappropriate
Flag as inappropriate

Select your reason for flagging this presentation as inappropriate.

Cancel

11 of 1 previous next

  • Full Name Full Name Comment goes here.
    Are you sure you want to
    Your message goes here
    Processing…
Post Comment
Edit your comment

    Sexual Reproduction In Animals Sexual Reproduction In Animals Presentation Transcript

    • Sexual Reproduction in Animals Gamete – egg Gonad – ovary Few to many eggs - oogenesis Egg cells are (n) haploid/monoploid Gamete – sperm Gonad – testes Many sperm cells - spermatogenesis Sperm cells are(n) haploid/monoploid Female Male
    • Egg *Larger than a body cell *Cannot move on its own *Round shape Sperm *Smaller *Swims through liquid *Head, middle, & tail (flagellum)
    • Fertilization
      • Sperm nucleus enters the egg and moves to the egg nucleus. The 2 nuclei join together and then form a zygote .
    • External Fertilization *outside the body
      • Animals that breed in the water
      • Many hazards in the environment
        • Sperm and egg may not meet
        • Eggs or offspring may be eaten
        • May die due to environmental conditions
          • Temperature
          • Oxygen level
      • Large number of sperm and egg are released to overcome hazards
      • Hormones control behavior to have sperm and egg released at the same time.
    • Internal Fertilization *within the female body
      • Land animals
      • Some aquatic animals
        • Shark
        • Octopus
      • Requires specialized sex organ to carry sperm to body of female
      • Watery environment needed for sperm to swim to the egg
      • After fertilization, zygote is enclosed in a protective shell and released OR remains and develops in female body
      Zygote Turtle laying eggs
      • Internal Fertilization
        • Fewer eggs needed
        • Well protected
        • Increased chance of fertilization
        • Parthenogenesis – development of unfertilized egg into an adult.- Bees & Wasps