March 12, 2007

March 12, 2007 - March 12, 2007 Animal Reproduction Ch. 43...

Info iconThis preview shows pages 1–2. Sign up to view the full content.

View Full Document Right Arrow Icon
March 12, 2007 Animal Reproduction Ch. 43 Asexual Reproduction Highly efficient Does not generate genetic diversity Organisms do not move around a lot Sexual Reproduction The joining of 2 haploid cells into one Gametogenesis 2 events in meiosis contribute to genetic diversity Crossing over Independent assortment 3 fundamental steps: Gametogenesis Mating Fertilization Gametogenesis Takes place in the gonads Male gametes are called sperm Move by beating flagella Female gametes are called eggs or ova Nonmotile Gametes are formed from special cells called germ cells Spermatogenesis Involves 2 meiotic divisions: Primary spermatocytes -> secondary spermatocytes -> 4 haploid spermatids Spermatocytes remain in cytoplasmic contact throughout development Share gene products from X chromosome Once formed spermatids undergo further maturation Oogenesis 2 meiotic divisions Development of the primary oocyte stops in prophase I
Background image of page 1

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

View Full DocumentRight Arrow Icon
Image of page 2
This is the end of the preview. Sign up to access the rest of the document.

Page1 / 2

March 12, 2007 - March 12, 2007 Animal Reproduction Ch. 43...

This preview shows document pages 1 - 2. Sign up to view the full document.

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