This lesson contains 13 slides, with text slides and 1 video.
Lesson duration is: 45 min
Items in this lesson
BS5.3 Genes and alleles
Slide 1 - Slide
Planning
Starter
Instruction DNA
Make assignments 1 + 5
Instruction mutations
Make assingments 2,3, 6 and 8
Slide 2 - Slide
Starter
Answer the following questions:
1. How many chromosomes do you have in a body cell?
2. How many chromosomes do you have in a sex cell?
3. How do you call the substance chromosomes are made of?
timer
1:00
Slide 3 - Slide
Slide 4 - Slide
Important words:
- base
- basepair
-
Slide 5 - Slide
Gene and allele
Example:
Gene:
Eyecolour
Allele (=gene variant):
- Brown eyes
- Blue eyes
- Green eyes
Slide 6 - Slide
They all have 2 genes for hair type, but their alleles are different
Slide 7 - Slide
Get to work
BS5.3 ex. 1 and 5
Slide 8 - Slide
Mutations
A chromosome may get damaged and the information for one or more hereditary characteristics may change as a result. Such a sudden alteration in the genotype is called a mutation (meaning a ‘change’).
Lesson duration is: 45 min
