5.1 - 5.2 - 5.3

• Biologie
• Middelbare school
• vwo
• Leerjaar 2

Genetics 

What will we do 

• Welcome 
• Assignment genetics 15 mins?
• Explenation
• Practice test! 
• Answers 

Learning goals 5.1, 5.2 and 5.3 

1. You can describe what the genotype and phenotype are. 

2. You can explain that cells only use the hereditary information that they need. 

3. You can explain how each of the parents supplies 50% of the chromosomes. 

4. You can say how the sex of humans is determined by sex chromosomes. 

5. You can explain how sexual reproduction causes variation in genotypes. 

6. You can describe what genes and alleles are. 

7. You can describe what a mutation is.

Genotype

Phenotype

Risk for a genetic disease

Inheritance

Why we look like our family members, but still are all different

Does the information for hereditary traits change when a cell is copied?

1. yes
2. no

This is a picture of ..

1. chromosome
2. gene
3. DNA
4. cell

How many chromosomes do human have?
(look at the karytype)

How many chromosomes does Chamaecrista fasciculata have?

(see picture)

1. 8
2. 3
3. 16
4. 20

How many chromosomes does a muscle cell of a cat have?

1. 38
2. 46
3. 19
4. 21

DNA

Nucleus

Cell

Chromosome

Gene

DNA

4 different bases (nucleotides)

cytosine

guanine

adenine

thymine

double helix (ladder)

information is stored in code

AATCCGGACGAATTCCGGAAAAAATTTTTTTTTTTTTTTTTTCGCGCGAATTCATATATATCGGACGGACGAAC etc etc etc it would be a very thick book :-)

GENE: section of DNA with complete code for a protein

proteins

Lots of functions

E.g. enzymes, hormones, antibodies, cell structure

gene = code for 1 protein

Genes determine your characteristics

Below are a few codes with 4 letters.
Which of these codes show a piece ofDNA?

1. ABCDBDCA
2. CAEFEAFC
3. GACTATGC
4. TACDDTAC

What do you call the part of a chromosome that carries the information for 1 heriditary trait?

1. DNA
2. a gene
3. a mother cell
4. an egg cell