1. Asexual and Sexual Reproduction

2. Key Concepts and Vocabulary
Differences between asexual and sexual reproduction
What is a chromosome?
Why do different cells have different numbers of chromosomes?
Key Vocabulary:
Asexual
Sexual
Chromosome
Haploid
Diploid

3. Asexual Reproduction
Production of offspring that only requires one parent
Parents and offspring have the same traits
DNA of the offspring is identical to the parents
Usually found in unicellular and other simple organisms
What are some examples of organisms that reproduce asexually?

4. Types of Asexual Reproduction
Binary fission –
Mitosis –
Budding –
Fragmentation –

5. Types of Asexual Reproduction

6. Sexual Reproduction Production of offspring that requires two parents
What two cells join together in sexual reproduction?
Parents and offspring can have different traits
The DNA of the offspring is a combination of DNA from both parents
Most multicellular organisms reproduce sexually

7. Sexual Reproduction
Sexual reproduction produces genetically diverse populations
Why is genetic diversity important?

8. Chromosomes
Structures that contain all the DNA that is passed from parents to offspring during reproduction
Chromosomes are made of chromatin
Chromatin is made of tightly wound DNA

9. Chromosomes
Chromosomes have two parts – chromatids held together by a centromere
Draw and label a diagram of a chromosome below:
The chromatids are exact copies of each other

10. Chromosome Numbers
Most cells in sexually reproducing organisms have two identical copies of each chromosome
These cells are called diploid cells
What does diploid mean?
The two identical chromosomes are called homologous chromosomes
What does homologous mean?

11. Chromosome Numbers
Sperm and egg cells only contain one copy of each chromosome
These cells are called haploid cells
What does haploid mean?
Why would sperm and egg cells only have one copy of each chromosome?

12. Human Chromosomes Human diploid cells have 46 total chromosomes
How many different chromosomes do human cells have?
How many chromosomes do human sperm and egg cells have?