Asexual

1
Reproduction
Whats the difference in these two forms of
reproduction?
2
Essential Question How does sexual and asexual
reproduction affect the passing of traits to
offspring?
Standard S7L3b. Compare and contrast that
organisms reproduce asexually and sexually
(bacteria, protists, fungi, plants and animals)
3
Reproduction

• Previously, you learned that cells make more
  cells through the process of
• You learned that sex cells are created in a
  process called
• You learned that adults produce offspring with
  the help of which system

Mitosis
Meiosis
Reproductive System
4
For this unit, we will look at reproduction with
a more specific focus on the passing of traits.
5
Asexual
Reproduction
vs.
Sexual
6
Use the Types of Reproduction Chart to take Notes
7
Asexual Reproduction
8
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

9
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.

10
Asexual Reproduction
11
Asexual Reproduction

• Binary Fission is a form of asexual reproduction
  that occurs in cells that do not contain a
  nucleus (Prokaryotes)

12
Asexual Reproduction
13
Other Examples of Asexual Reproduction
14
Sexual Reproduction
15
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.

16
A Eukaryotic cell has a Nucleus that contains
genetic material.
A Chromosome is the structure that holds the
genetic material (DNA).
A Gene is a section of DNA that provides
instructions for specific traits.
DNA is the genetic material that provides
instructions for all the bodys functions.
17
Sexual Reproduction

• Each species of living things has a
  characteristic number of chromosomes.
• Humans have 23 pairs, for a total of 46
  chromosomes.

18
Sexual Reproduction

• Recall from our previous unit the cell process
  called Meiosis.
• What was the purpose of Meiosis?
• What was our general description of Meiosis?

Make Sex Cells
One Cell Makes Four Cells
19
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.

46Chromosomes
23Chromosomes
20
Sexual Reproduction
21
Sexual Reproduction
22
Reproduction
http//www.youtube.com/watch?vjk2RJm5RBEk
23
Asexual Sexual Reproduction Sorting Activity
24
Investigating Reproductive Strategies Activity
25
Comparing Asexual Sexual Reproduction