YR2-B6-LSN2

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 2

HAVE READY:

• Your Macbook. (3 desktops)

• #1: Your I-book page 2.
• #2: Google Chrome:  bio classroom, your hw, your notes file.
• #3: Lessonup.app (check bottom left).

BIOLOGY

YEAR 2 

LESSON 2

SECTION 1

Booklet 6 Section 1:

• Discuss in your groups what was covered last lesson.
• Explain what your learned last lesson, check your notes if you want.
• Discuss the hw questions with each other.
• Come up with a maximum of one or two questions you can ask the class in the next slide.
• Remember class discussion rules!
• !!!! INSIDE VOICES AND ENGLISH PLEASE !!!!

Key Questions

Look at the key questions on  I-Book page 2, can you answer them?

Questions about Section 1: theory and hw?

Sexual Reproduction

two parents

1/2 DNA comes from each parent

give a lot of variation

usually happens in larger more complex organisms

uses both mitosis and meiosis

Asexual reproduction

one parent

all the DNA comes from one parent

very little variation

usually happens in smaller simpeler organisms

uses only mitosis no meiosis

Mitosis:

• The daughter cells are an exact copy of the mother cell.

• Interphase - the cell is at rest and is already copying the chromosomes.
• Prophase - the step before mitosis the nucleus is still there
• Metaphase - the chromosomes move to the middle of the nucleus.
• Anaphase -  the chromosomes split and the separate chromosomes move away from each other.
• Telophase - the separated chromosomes form two new nuclei at each end of the cell.

Meiosis:

• Is used to create gametes.
• PMAT is done twice!

• Prophase - the step before mitosis the nucleus is still there
• Metaphase - the chromosomes move to the middle of the nucleus.
• Anaphase -  the chromosomes split and the separate chromosomes move away from each other.
• Telophase - the separated chromosomes form two new nuclei at each end of the cell.

Booklet 6 Section 2:

• Read pages 5-8 of your I-Book.
• Take some quick notes as you are reading.
• Discuss the notes you have taken in your groups.

• 6 minutes of silence and 6 minutes of talking.

• !!!! INSIDE VOICES AND ENGLISH PLEASE !!!!

Key Questions

Look at the key questions on  I-Book page 5, can you answer them?

Sexual Reproduction in plants:

with the stamen and the carpels

pollination

fertilization

dispersal

germination

Asexual reproduction in plants:

with mitosis

runners

bulbs

tubers

cuttings & grafting

Sexual Reproduction in Animals

Most animals that have sexual reproduction have 3 phases:

1. Pre-Fertertilization (the gametes also known as sex cells are produced and prepared).
2. Fertilization (the sex cells are brought together somehow and melt together to form on cell "zygote").
3. Post-Fertilization (the zygite start dividing by mitosis and becomes and embryo which continues to grow).

Examples?

Asexual Reproduction in Animals

1. Some very small animals are so small they can reproduce by mitosis.
2. A hydra can reproduce by budding, many species of jellyfish reproduce this way too.
3. Some animals can reproduce by means of fragmentation. This means that they can break off a piece of themselves and a whole new organisms can grow from that piece. Flatworms, starfish and seasponges can do this.

If you cut yourself, which process heals the wound?

1. mitosis
2. meiosis

In a plant, which process produces the pollen grains?

1. mitosis
2. meiosis

Which process makes your hair and fingernails grow?

1. mitosis
2. meiosis

Which process produces sperm cells in cats?

1. mitosis
2. meiosis

How does and apple tree reproduce, sexually or asexually?

1. sexual reproduction
2. asexual reproduction

How do starfish reproduce?

1. budding
2. fragmentation

How do potato plants reproduce?

1. runners
2. cuttings
3. bulbs
4. tubers

How do birds reproduce?

1. sexual reproduction
2. asexual reproduction

Please be honest, what did you think of this lesson.

Homework for lesson 3:

• Study the Quizlet "Glossary Reproduction" 100% on "Flashcards".
• Complete the exercises to your level in "HW for lesson 3" on Google Classroom.
• If you are a minimalist and bio is not your favorite subject, you must complete the work to at least level 2 for havo and level 3 for vwo at minimum.

• Good luck!!