2TTO MH - Unit 5 - Revision

• Biologie / Verzorging
• Middelbare school
• vmbo t
• Leerjaar 2

Revision unit 5: Inheritance

Why your teacher is at home...

LESSON PLAN

TODAY:

- What do you need to know for the test?

- Revision unit 5   (lesson up)

TOMORROW:

- No zoom lesson!!  

- Prepare yourself for the test

What you should know about basic 1

• The meaning of these keywords:
     genotype
     phenotype
     chromosomes
• Why chromosomes occur in pairs
• How the phenotype is determined

What do we call the way an organism
looks like?

1. Genotype
2. Phenotype

Genotype

How is the phenotype of an organism determined?

1. Only by the genotype
2. Only by the environment
3. By both genotype and environment

Phenotype =

genotype

+

environment

Chromosomes occur in pairs

How many chromosomes can you find in a human body cell?

What you should know about basic 2

• The meaning of these keywords:
     sex cells
     gene
• When the genotype is determined

Sex cells

Which statement is correct?

1. One chromosome contains one gene
2. One chromosome contains many genes
3. One gene contains one chromosome
4. One gene contains many chromosomes

Chromosomes

and 

genes

When is the genotype determined?

1. At the moment of childbirth
2. During pregnancy
3. At the moment of fertilisation
4. During the person's life

What you should know about basic 3

• The meaning of these keywords:
     sexual reproduction
• Why all sex cells of a person are different
• How twins are formed

Why all sex cells are different

How many sperm cells are needed to form identical twins? And how many egg cells?

1. 1 sperm cell + 1 egg cell
2. 1 sperm cell + 2 egg cells
3. 2 sperm cells + 1 egg cell
4. 2 sperm cells + 2 egg cells

Twins

What you should know about basic 4

• The meaning of these keywords:
     mutation
     mutant
     mutagen
     malignant tumour + benign tumour
     metastasis
• How cancer occurs

What's the best description for
"mutation"?

1. A sudden change in an organism
2. A sudden change in a cell
3. A sudden change in a nucleus
4. A sudden change in the DNA

A mutation

True or false:
A mutation usually doesn't have an effect in the phenotype

1. True
2. False

True or false:
cancer can be the result of a mutation

1. True
2. False

Cancer

What is it called when cancer starts spreading out to other parts of the body?

1. Benign tumour
2. Malignant tumour
3. Metastasis

What you should know about basic 9

• The meaning of these keywords:
     homozygous & heterozygous
     dominant & recessive
• How you can write genes in letters

Homozygous

Homozygous & heterozygous

Which gene is the strongest?
How do you write a dominant gene
in letters?

1. The dominant gene, written like A
2. The dominant gene, written like a
3. The recessive gene, written like A
4. The recessive gene, written like a

TEST UNIT 5

• Textbook unit 5:
      - Basics 1 + 2 + 3 + 4 + 9
      - Summary: objectives 1 + 2 + 3 + 4 + 5 + 12
• Your notebook:
      - Glossaries unit 5