Fundamental Sequence of Sexual Reproduction

Requirements for Successful Sexual Reproduction
1.
2.
These requirements are achieved differently by each animal species
Mating Patterns
. Varies from species to species.

1 mating season/year
 mating timed so that birth occurs when conditions are favourable
 mating when conditions are favourable for mating o (full or new moon)
 mating only once per lifetime and storing sperm o
SNC1D – Ms. Booth - 16/04/2020 - Page 1 of 2 – Notes/images from SciencePower9

Fertilization Patterns in Animals


fertilization o sperm and egg combine outside the body o dwelling animals o ex.
 female lays cluster of eggs
 male releases sperm onto eggs

fertilization o dwelling animals o to transfer sperm (not birds) o ex. Reptiles and birds lay eggs o ex. mammals keep the embryo inside for nourishment and protection o ex. marsupials keep the young offspring in the pouch for nourishment and protection
Hermaphrodites

Are animals that have male and female sex organs and produce egg and sperm

Still mate with each other

Earthworms and flatworms

Sperm ejected into the other worms reproductive pore
SNC1D – Ms. Booth - 16/04/2020 - Page 2 of 2 – Notes/images from SciencePower9