5.7 Tracing your family history

When a gene is located on the X-chromosome, we call this a ...
1 / 14
next
Slide 1: Open question
BiologieMiddelbare schoolhavo, vwoLeerjaar 3

This lesson contains 14 slides, with interactive quizzes, text slides and 1 video.

time-iconLesson duration is: 50 min

Items in this lesson

When a gene is located on the X-chromosome, we call this a ...

Slide 1 - Open question

This item has no instructions

Can a man be a carrier for a sex-linked-gene?

Slide 2 - Open question

This item has no instructions

Why do men have a higher chance of expressing a sex-linked-gene in their phenotype?

Slide 3 - Open question

This item has no instructions

pedigree
 A pedigree is a visual tool for 
following an inherited characteristic 
through generations of a family.

Slide 4 - Slide

This item has no instructions

Slide 5 - Slide

female - circle
male - square
who is brother/sister of who
who is new to the family
PEDIGREES

Slide 6 - Slide

This item has no instructions

Slide 7 - Video

This item has no instructions

black square is male with disease
black circle is female with disease
X-linked dominant? or
X-linked recessive? 

Slide 8 - Slide

a filled in square or circle means it expresses the characteristics (trait)

usually you cant see who is carrier

both male are affected with no affected female so its X-linked and since male 3 doesnt have its recessive
black circle is female with disease
black square is male with disease
4
what is the genotype of person 4?

Slide 9 - Slide

person 4 Aa
LET'S PRACTISE 
Could this disease be ...

a. autosomal dominant? 
b. autosomal recessive? 
c. X-linked dominant? 
d. X-linked recessive? 

Yes / No ? Explain your answer. 

Slide 10 - Slide

This item has no instructions

Autosomes
Autosomes
'Normal' genes
AA - Aa - aa
Sex chromosomes
Sex-linked genes
XHXH - XHXh - XhX
XHY - XhY

Slide 11 - Slide

This item has no instructions

LET'S PRACTISE 
Could this disease be ...
a. autosomal dominant? No
b. autosomal recessive? Yes
c. X-linked dominant? No
d. X-linked recessive? Yes

Yes / No ? Explain your answer. 

Slide 12 - Slide

This item has no instructions

LET'S PRACTISE!
Answer the exercises to practise how to calculate probabilities & apply your knowledge on mutations. 

Slide 13 - Slide

This item has no instructions

LET'S CHECK THE HOMEWORK
Download the answers from SOM &
Discuss the answers with a classmate. 

Slide 14 - Slide

This item has no instructions