What state has oocyte reached at ovulation?

Karyotyping and Gametogenesis Lab Activity

Overview

You will complete a karyotyping lab activity and DNA Extraction lab experiment. Both deal with DNA which is stored as chromosomes in the nucleus of our cells. Karyotyping

This assignment will allow you to investigate what a karyotype is and how it is used to show disorders in humans. Complete the activity and submit the following assignment to the assignment link. This will be graded and the material will be seen on your module quiz.

Complete the Karyotyping Activity (opens window) found on the Biology Project site.

Copyright: http:www.biology.arizna.edu

Conclusion Questions: (Worth 10 pts each)

1. What is a karyotype actually?

2. How many chromosomes do humans have?

3. What are karyotypes used for?

4. What is nondisjunction and what cause it to happen?

5. What observations can you make regarding patient A’s karyotype?

6. What diagnosis would you give patient A? Explain your answer.

7. What observations can you make regarding patient B’s karyotype?

8. What diagnosis would you give patient B? Explain your answer.

9. What observations can you make regarding patient C’s karyotype?

10. What diagnosis would you give patient C? Explain your answer.

 

 

Gametogenesis Overview

 

The sperm and egg cells, or gametes, are created via cell division called meiosis. You will explore meiosis, spermatogenesis and oogenesis in the following animations, then show your understanding by answering the conclusion questions.

 

View the following short videos to find the answers to the conclusion questions. Your book is also a valuable resource.

Meiosis Overview (Opens in new window)

Unique features of Meiosis(Opens in new window)

Spermatogenesis (Opens in new window)

Oocyte and Follicle Development (Opens in new window)

 

Conclusion Questions (Worth 10 pts each)

1. What are 3 features that differentiate mitosis from meiosis?

2. Where are the cells that undergo meiosis found in the male and female?

3. Define haploid vs diploid

4. What is the goal of meiosis I?

5. What is the goal of Meiosis II?

6. What is spermatogenesis? When does this process begin in males?

7. What would the process for female egg (oocyte) production be called? When does this process begin in females?

8. What are oocytes surrounded by? Why do you think the surrounding structures are physiologically important?

9. What state has oocyte reached at ovulation?

10. What stage is oocyte at fertilization?

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