Development

Development - Animal Reproduction and Development...

Info iconThis preview shows pages 1–5. Sign up to view the full content.

View Full Document Right Arrow Icon
Animal Reproduction and Development
Background image of page 1

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

View Full DocumentRight Arrow Icon
Reproductive Modes A) Asexual Reproduction Examples: Binary Fission, Budding, Mitosis single parent organism produces genetically identical offspring without gametes B) Sexual Reproduction parents produce gametes, which fuse to produce variable offspring But, Sexual reproduction is more “costly” 1. Specialized structures for gametes 2. Behavioral challenges (courtship) 3. Investment in offspring (nourishment)
Background image of page 2
Stages of Reproduction/ Development 1) Gamete Formation MEIOSIS Egg (n) Sperm (n) Males produce 4 sperm per germ cell 2n n n n n 4 sperm cells Gametes start out as (diploid) germ cells 2n n n n n 3 polar bodies ovum Females produce 1 egg per germ cell
Background image of page 3

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

View Full DocumentRight Arrow Icon
b) Internally land-dwellers specialized structures for housing gametes embryo more protected during development Fertilization may occur… a) Externally aquatic habitats gametes released into the environment large numbers of gametes produced 2) Fertilization Zygote (2n)
Background image of page 4
Image of page 5
This is the end of the preview. Sign up to access the rest of the document.

This note was uploaded on 10/05/2008 for the course ECON 315 taught by Professor Wheeler during the Spring '08 term at Maryland.

Page1 / 9

Development - Animal Reproduction and Development...

This preview shows document pages 1 - 5. Sign up to view the full document.

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