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Reproduction
What’s the difference in
these two forms of
reproduction?
White boards:
How does sexual and asexual
reproduction affect the passing
of traits to offspring?
Reproduction

Cells make more cells through the
process of …
Mitosis

Sex cells are created in a process
called…
Meiosis

Adults produce offspring with the help
of which system…
Reproductive System
For this unit, we will
look at reproduction
with a more specific
focus on the passing
of traits.
Reproduction
Asexual
vs.
Sexual
Asexual
Reproduction
Asexual Reproduction

Most unicellular organisms, and a few
multicellular organisms use cell
division to reproduce in a process
called asexual reproduction.

A parent organism produces one or
more new organisms that are identical
to the parent and live independently
of the parent
Asexual Reproduction

The organism that produces the
new organism or organism is the
parent

Each new organism is an offspring

The offspring produced by asexual
reproduction are genetically
identical to the parent.
Asexual Reproduction
Asexual Reproduction
Binary Fission is a
form of asexual
reproduction that
occurs in cells
that do not
contain a nucleus
(Prokaryotes)
Asexual Reproduction
Other Examples of
Asexual Reproduction
Sexual Reproduction
Sexual Reproduction
Type of reproduction in which
two parent cells (male and
female reproductive cells)
combine to form offspring
with genetic material from
both cells.
A Eukaryotic cell has
a Nucleus that
contains genetic
material.
Heredity is the
passing of Genes
from parents to
offspring.
A Gene is a section of DNA that provides
instructions for specific traits.
A Chromosome is the
structure that holds
the genetic material
(DNA).
DNA is the genetic
material that provides
instructions for all the
body’s functions.
Sexual Reproduction


Each species of living things has
a characteristic number of
chromosomes.
Humans have 23 pairs, for a total of
46 chromosomes.
Sexual Reproduction

What is the purpose of Meiosis?
Make Sex Cells

What is our general description of
Meiosis?
One Cell Makes Four Cells
Sexual Reproduction

The process of Meiosis
creates sex cells (sperm
and egg in humans) that
contain half the genetic
material (half the 46
chromosomes)

During sexual reproduction,
sex cells are combined to
form unique offspring.
46
Chromosomes
23
Chromosomes
Sexual Reproduction
Sexual Reproduction
Investigating
Reproductive Strategies
Activity
Comparing
Asexual &
Sexual
Reproduction
Essential Question:
How does sexual and asexual
reproduction affect the passing
of traits to offspring?