Tuesday, February 1, 2022

Errors During Meiosis

 






















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Friday, January 28, 2022

The Stages of Meiosis

 This illustration outlines the stages of meiosis. In interphase, before meiosis begins, the chromosomes are duplicated. Meiosis I then proceeds through several stages. In prophase I, the chromosomes begin to condense and the nuclear envelope fragments. Homologous pairs of chromosomes line up, and chiasmata form between them. Crossing over occurs at the chiasmata. Spindle fibers emerge from the centrosomes. In prometaphase I, homologous chromosomes attach to the spindle microtubules. In metaphase I, homologous chromosomes line up at the metaphase plate. In anaphase I, the spindle microtubules pull the homologous pairs of chromosomes apart. In telophase I and cytokinesis, the sister chromatids arrive at the poles of the cell and begin to decondense. The nuclear envelope begins to form again, and cell division occurs. Meiosis II then proceeds through several stages. In prophase II, the sister chromatids condense and the nuclear envelope fragments. A new spindle begins to form. In prometaphase II, the sister chromatids become attached to the kinetochore. In metaphase II, the sister chromatids line up at the metaphase plate. In anaphase II, the sister chromatids are pulled apart by the shortening spindles. In telophase II and cytokinesis, the nuclear envelope forms again and cell division occurs, resulting in four haploid daughter cells.

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Wednesday, January 26, 2022

The Stages of Mitosis

 Topics discussed: The Stages of Mitosis and the Ramifications of cells growing out of control.


 The Stages of Mitosis.  (Click on the image to enlarge.)








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Tuesday, January 25, 2022

Unit Unit : Cellular Basis of Reproduction and Genetics

 Chapter 8.

Welcome to Genetics!!

We will start the unit by studying Cellular Reproduction.  The unit has a lot of new vocabulary words that are not used elsewhere.  Do not wait, rather start studying the vocabulary words daily.

Asexual Reproduction (Binary Fission):






Sexual Reproduction:


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Thursday, January 13, 2022

Photosynthesis Analogy and Videos

 Hard Hat Analogy of the light reactions


Video Links below: 

The Worlds Smallest Factory

Photosynthesis by Amoeba Sisters

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Tuesday, January 11, 2022

Photosynthesis Lab on January 12, 2022

 The lab will be recorded as a test grade.

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Monday, January 10, 2022

Photosynthesis

The posted dated January7 - January 10th was intended for the Regular Biology class.

Read through the Chapter from the introduction to section 7.8 on page 116..
The pages for the Packet and the PowerPoint for the chapter are posted in Google Classroom,


 The above image was taken from Campbell Biology, Concepts 7 Connection. 9th Edition.


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