lecture 14 - Sexual Dimorphism • Anisogamy – Evolution...

Info iconThis preview shows pages 1–8. Sign up to view the full content.

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon

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

View Full Document Right Arrow Icon
This is the end of the preview. Sign up to access the rest of the document.

Unformatted text preview: Sexual Dimorphism • Anisogamy – Evolution – Function – Maintenance • Other Sexual Dimorphisms – Evolution – Function – Maintenance Anisogamy • Anisogamy: Reproduction by the union of two gametes that differ in form or size (usually size) • By convention: – Small motile gametes are Male – Large immobile gametes are Female – But forget “male” and “female” for a while • Most multicellular organisms have: – Two sexes – Pronounced anisogamy Differences? Size Number Motility Selection Pressures on Gamete Size • Productivity-- the number of gametes produced per unit time by a given parent • Zygote fitness-- a measure of the probability that a zygote will survive to adulthood and reproduce, in the shortest time • All things being equal, the maximum reproductive productivity occurs with the maximum number of gametes possible without reducing nuclear material. – V/n would maximize productivity when it results in the nuclear size plus the minimal amount of cytoplasm possible. – n then represents the productivity Gamete size Benefits to being tiny?...
View Full Document

{[ snackBarMessage ]}

Page1 / 30

lecture 14 - Sexual Dimorphism • Anisogamy – Evolution...

This preview shows document pages 1 - 8. Sign up to view the full document.

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