Offspring Traits - Asexual Is The Question!
There are two types of reproduction. Sexual and Asexual.
To really understand what those words mean lets break them apart.
Asexual reproduction
Asexual is easier to break apart. The prefix A comes from
the Greek language and means "without." "Sex" means
"to cross." Thus the term asexual means "without to cross"
which really doesn't make sense but it is also defined as without crossing.
Asexual organisms make exact copies of themselves, almost like a photocopy.
This photocopy is almost identical but mistakes can happen that allow
different traits to occur in the copy. One of the big differences is that
the copy is usually a little smaller especially in larger organisms who
reproduce this way. Some examples of animals who reproduce asexually are:
Amoeba
Bacteria
Hydra
Paramecium
Jellyfish
Lindens,
like many trees can reproduce asexually through a process called propagation.
Propagation means that humans cut a part of the tree off and plant it
so that it grows roots and begins a new tree. Certain trees like navel
oranges which have no seeds can only reproduce this way.and some plants
especially under certain circumstances.
Sexual reproduction
We already know that asexual means without crossing or only one parent.
Sexual means to cross. Sexual reproduction means that two
parents combine parts of their genetic material. With sexual reproduction
there is usually a male and a female. The male contributes a copy of half
of his genetic material and the female contributes a copy of half of her
genetic material. The baby that is born is called the offspring.
In a very basic way, offspring get half of their traits from each parent.
Because of the way the male and female copy their own genetic material
and the way they are combined each offspring is different. It is a little
like rolling dice for each offspring. Some animals that reproduce sexually
are:
bee
turkey
beetle
lizard
chipmunk
ferret
petunia
toad
mallards
seal
Both
Many plants and animals are adapted to reproduce both ways. There are
advantages toeach
method. Jellyfish are an example of an animal that can reproduce both ways. They reproduce
sexually but the also reproduce asexually. The asexual way allows them
to make many copies of themselves that have an easier time finding a mate
than one copy would. The sexually reproducing copies can then find a mate
and produce offspring with different traits. These different traits may
give the offspring an advantage that the parents didnt have. Other
organisms which may reproduce using both asexual and sexual reproduction
include:
Daffodil
Cactus
Sponge
Starfish
Mushroom
Analysis:
Use a diagram like the circles below to compare and contrast
sexual and asexual reproduction. List characteristics about sexual reproduction
in the right circle and characteristics of asexual reproduction in the
left circle. Where the two circles overlap put characteristics that the
two types of reproduction have in common.
- What advantages are there to sexual reproduction?
- What advantages are there to asexual reproduction?
- What would you say is the most important difference between the the two types of reproduction?

