6repro - BIO 20 POP REPRO 1 POPULATION REPRODUCTION 1....

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

View Full Document Right Arrow Icon
POP REPRO 1 POPULATION REPRODUCTION 1. INTRODUCTION ‘strategy’ - not a conscious plan - analyze factors in evolutionary history reproduction - criterion for fitness (also survival) - produce offsprings - increase or maintain population ideal - repro after birth, repeat often reality - life is full of compromises asexual - organisms split in half - rapid but no genetic variation sexual - combine gametes from diff organisms - increase genetic variation - but inefficient (time, energy, cells) spermatozoa - small, numerous, motile ovum - larger, fewer, non-motile, food dioecious - ‘two-houses’ - gonads in separate organisms - must cross-fertilize monecious - ‘one-house’ or hermaphroditic - both gonads in same organisms - sequential or simultaneous - parthenogenesis (without sperm) genetic S.D. - sex established at fertilization - determined by sex chromosomes
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 / 3

6repro - BIO 20 POP REPRO 1 POPULATION REPRODUCTION 1....

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