Single traits

Welcome!
Today:
Discussing homework 
Explanation about inheriting single traits
Answering/discussing excercises 
1 / 14
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Slide 1: Tekstslide
BiologieMiddelbare schoolhavoLeerjaar 2,3

In deze les zitten 14 slides, met interactieve quiz en tekstslides.

time-iconLesduur is: 48 min

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Welcome!
Today:
Discussing homework 
Explanation about inheriting single traits
Answering/discussing excercises 

Slide 1 - Tekstslide

What are we going to learn today?
We are going to learn:
the difference between genotype and phenotype. 
What genes and alleles are.
How traits are being passed over from generation to generation.
How traits can also skip a generation. 

Slide 2 - Tekstslide

Genotype/phenotype
Your appearance is called your phenotype. For the most part this is determined by your genotype, your genetic material. However, you can change your phenotype by altering your appearance, but this doesn't change your genotype. 

Slide 3 - Tekstslide

Changing your phenotype

Slide 4 - Tekstslide

Checkpoint 1
Please make questions 1 and 2 in your workbook. 
timer
4:00

Slide 5 - Tekstslide

Chromosomes

Slide 6 - Tekstslide

Chromosome pair 

Slide 7 - Tekstslide

Alleles
Both chromosomes in a pair have the same genes, but the variations, alleles, are different. 
Some alleles are dominant (A), when they are present in a gene, they always become visible. Recessive alleles (a), only become visible when there isn't a dominant allele. 

Slide 8 - Tekstslide

Alleles
For every trait there are at least two alleles present, in every chromosome from the same pair. So you always have 2 letters. When you have two of the same alleles (AA or aa), it is called homozygous. When you have two different alleles (Aa), it is called heterozygous. 

Slide 9 - Tekstslide

P-generation
Inheriting traits always start at a parent generation (P-generation). You always have to know their genotype about the trait. You always have to write it down as: (genotype parent 1) x (genotype parent 2)
For example: Aa x aa

Slide 10 - Tekstslide

2 labradors are going to mate. One has a brown fur, the other one blonde. Brown fur is dominant over blonde fur. Both dogs are homozygous. What is the genotype of the parents?
A
AA x aa
B
Aa x AA
C
Aa x aa
D
Aa x Aa

Slide 11 - Quizvraag

What genotype does the F1 have? (first generation offspring)
P = AA x aa

Slide 12 - Tekstslide

What is the fenotype of the F2? (second generation offspring)
F1 = Aa x Aa

Slide 13 - Tekstslide

Exercises 
Please start with questions 1 through 9. Which will be homework for next lesson! 

See you all next week! ūüėä

Slide 14 - Tekstslide