CVA Final review
What is evolution and how does it relate to phenotype?
o Evolution = Changes in the genetic makeup of populations of animals through time.
o Evolutionary change in genetics leads to changes in animal morphology, a.k.a.
Gregory M. Erickson, Ph D.
Department of Biological Science
In this class we will be studying differences between organisms in their
anatomical form. We will try to make sense of this diversity in light of
If I on ly
If I on ly had had dorsal and
a tripartite venral aorta e!
If I only had
Theres no complex sense
The first craniates and a march
through time with the Vertebrata
The evolution of the distinctive
Major terms and concepts in Evolutionary
There are a number of terms and
concepts you will hear over and
over in this course that you must
understand to become a
Some pertain to evolutionary concep
The first vertebrates and their
ancestors: the search for our ancestry
Characteristics of the very first
The first vertebrates showed up
~544 million years ago
These were fish-like animals that
lacked jaws and lateral fins, and
were filter fee
The next major clade of gnathostomes was the
Elasmobranchomorpha (cartilage fish-800
species today, the dogfish you will dissect)
originating in the Middle Ordivician-sharks,
skates, and rays
They have fin rays called
Ceratotrichia made of pure collagen
Life history begins with fertilization it
is followed by embryonic development,
maturation, and in some cases
senescence (truncated post-adulthood
During Vertebrate Fertilization-The haploid female sex cell
(gamete) - the egg,
Celebrity skin, is this your chin?
.or is that war youre waging?
Californication (1999 ) - RH CP
The integument or skin-the largest organ
in the body-15% by wt in humans
Has many functions and forms in vertebrates
Resists mechanical injury
Topics to be covered on the final for Comparative Vertebrate Anatomy
What is evolution and how does it relate to the phenotype?
Evolution: changes in the genetic makeup of populations of animals through time. Evolutionary change in