YR3-K16-LSN2M

• Biologie
• Middelbare school
• havo, vwo
• Leerjaar 3

HAVE READY

• JOIN THIS LESSONUP
• YOUR NOTEBOOK
• KERBOODLE PAGE 242

CHAPTER 16

INHERITANCE

• I know what chromosomes are, what they do and what they are made of. 

• I know what genes are and I can explain what they do. 

• DNA
• GENES
• CHROMOSOMES
• CHROMATIDS
• NUCLEOTIDES
• HAPLOID
• DIPLOID

Describe in outline the process of mitosis (cell division)

- DNA gets duplicated (replication)

- chromosomes get separated (mitosis)

- two new cells are formed (cytokinesis)

What is mitosis used for:

- asexual reproduction

- growth and repair

State two ways in which meiosis differs from mitosis and explain the significance of each difference

Mitosis:

1. one round of replication followed by one round of division.
2. genetically identical daughter cells
   

Meiosis:

1. one round of replication followed by two rounds of division.
2. four haploid sex cells

State where meiosis takes place in males and females

Males in the testes from puberty onwards.

Females in the ovaries (before birth).

Concept map

• I know what the different types of cell division are and what the main differences are.
• I understand the terms replication, translation & transcription and I can explain in detail in what order they happen and what the differences are. 
• 
  

• REPLICATION
• TRANSLATION
• TRANSCRIPTION
• MEIOSIS
• MITOSIS
• m-RNA

But how can DNA affect the colour of a feather?

Practice assignments in class: #1

Look at the image included in this slide, one is mitosis and the other is meiosis. 

A. Which one is which?

B. Please explain your answer in detail. (use key words like chromosomes, gametes, body cells, haploid and diploid)

Practice assignments in class: #1

A. The left is meiosis and the right is mitosis.

B. With mitosis the body copies the cells and chromosomes to produce new diploid body cells. With meiosis  the body splits the chromosomes one extra time to produce  haploid gametes. 

Practice assignments in class: #2

When making mRNA, the nucleotide Thymine gets replaced with the nucleotide Uracil (U). 

A. During which process does your body make mRNA

B. Look at the picture below of a piece of DNA, write down in your notebook what you predict the piece of mRNA will look like.

Practice assignments in class: #2

A. During the process called translation.

B. A-U-U-G-A-C-G-U-C-C-A

HOMEWORK FOR LESSON 3:

• COMPLETE THE HW FOR LESSON 3
• COMPLETE ANY IN CLASS ASSIGNMENTS LEFT FROM LESSON 2 IN YOUR NOTEBOOK