Asexual and Sexual Reproduction
Exploring Asexual and Sexual Reproduction
Hardly anyone can resist the appeal of babies. Have you ever held a puppy or a kitten? Many baby animals start out as small, young versions of their parents. But how did these puppies come into being? Where did they come from? Why do they look like miniature versions of adult dogs? Do you know of any organisms that look completely different when they are young than when they are adults?
New organisms result from reproduction—“producing again.” Puppies, kittens, ducklings, and many other organisms you are familiar with are the result of reproduction involving two parents. This is known as sexual reproductionglossary term (opens in a new window). But there are many other organisms that result from reproduction involving only one parent. This is known as asexual reproductionglossary term (opens in a new window). Fungi are an example of an organism that does not require two parents for reproduction. Do you know of any other organisms that reproduce asexually?
You can imagine that the mechanisms for both types of reproduction are complex, since they result in the making of a new organism. Genetic material must be combined, divided, passed on, differentiated, and much more.
Explain Question
Explain what happens during asexual and sexual reproduction.
Teacher Note
Purpose: Use this student response to evaluate students’ prior knowledge of the concept. The Model Lesson provides information on common student misconceptions. Suggested use: class discussion.
Before You Begin
What do you already know about asexual and sexual reproduction?
Teacher Note
Purpose: a formative assessment used to evaluate prior knowledge and misconceptions related to asexual and sexual reproduction. Suggested use: individual work.
Teacher Note
Purpose: a formative assessment used to evaluate prior knowledge and misconceptions related to asexual and sexual reproduction. Suggested use: individual work.
Find out More About...
- the process of DNA replication
- the phases of mitosisglossary term (opens in a new window)
Lesson Questions
- What are the differences between asexual and sexual reproduction?
- What are haploid and diploid cells?
- What is the function of each stage of meiosisglossary term (opens in a new window)?
- What are the differences between mitosisglossary term (opens in a new window) and meiosisglossary term (opens in a new window)?
- What are spermatogenesisglossary term (opens in a new window) and oogenesis?
- What are fertilizationglossary term (opens in a new window) and development?
- What is somatic cell nuclear transferglossary term (opens in a new window) (SCNT)?
- What are the effects of nondisjunctionglossary term (opens in a new window)?
- What are some examples of aneuploidyglossary term (opens in a new window), monosomy, and trisomy?