5.4 Inheritance

5.4 Inheritance
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Slide 1: Slide
BiologieMiddelbare schoolhavo, vwoLeerjaar 3

This lesson contains 29 slides, with interactive quizzes, text slides and 2 videos.

time-iconLesson duration is: 50 min

Items in this lesson

5.4 Inheritance

Slide 1 - Slide

Slide 2 - Slide

Slide 3 - Slide

Where in your cells can you find chromosomes?

Slide 4 - Open question

How many chromosomes do you have in each nucleus?
A
44
B
46
C
48
D
23

Slide 5 - Quiz

How many sex chromosomes do you have in a muscle cell?
A
0
B
1
C
2
D
46

Slide 6 - Quiz

How many X chromosomes do you have in a skin cell?
A
0
B
1
C
2
D
46

Slide 7 - Quiz

A cell with an X chromosome and a Y chromosome, can be a
A
muscle cell
B
sperm cell
C
egg cell
D
no cell

Slide 8 - Quiz

The building blocks for proteins are called ...
A
DNA
B
RNA
C
Amino acids
D
Ribosomes

Slide 9 - Quiz

The molecule
shown in the
picture is called ...
A
DNA
B
RNA
C
an amino acid
D
a ribosome

Slide 10 - Quiz

A segment of DNA has the following order of nucleotides : ATTGGCAGTA. What is the order of nucleotides on the other strand?

Slide 11 - Open question

Slide 12 - Video

A segment of DNA that codes for one protein is called a ...

Slide 13 - Open question

Allele =

Alleles =

Slide 14 - Slide

NOTE.
 • Dominant allele = 


 • Recessive allele = 


Slide 15 - Slide

What is an allele?
An allele is a different form of a gene

Slide 16 - Slide

Why do you have two alleles for each gene?

Because you have two chromosomes with the same gene (one from mom, one from dad)

Slide 17 - Slide

Oliver says: 'all humans have the same genes, but not the same alleles'. Charley says: 'all humans have the same alleles, but not the same genes'. Who is right?
A
Oliver
B
Charley
C
They both are
D
They are both wrong

Slide 18 - Quiz

Is it a gene or an allele?
GENE
ALLELE
skin colour
curly hair
flower colour
blue eyes
blood type
type A blood
colour-blindness
hair type
short wings in a fruit fly

Slide 19 - Drag question

5.4 INHERITANCE
  • You describe, explain, recognize and apply the following terms; homozygous, heterozygous, gene, alleles, dominant, recessive, carrier, P-generation, F1-generation, F2-generation.   
  • You can use your knowledge about inheritance and a Punnet-square to predict the probabilities of offspring having a given genotype or phenotype.
  • You can explain that you have two alleles for each gene.
  • You can use and recognize the notation for homozygous dominant (AA) /recessive (aa) and heterozygous genotypes (Aa).  

Slide 20 - Slide

NOTE. INHERITANCE (terminology)
Heterozygous = 2 different alleles Aa


Homozygous= 2 same alleles 

Homozygous dominant= 2 dominant alleles AA

Homozygous recessive= 2 recessive alleles aa

Slide 21 - Slide

Homozygous dominant:
A
RR
B
Rr
C
rr

Slide 22 - Quiz

Some fruit flies have curly wings instead of normal wings (see the pictures below). Answer the questions using the letter R for normal wings and r for curly wings:

normal wings                 curly wings
a. Which is the dominant allele? Give the letter and the characteristic. R normal wings
b. Which is the recessive allele? Give the letter and the characteristic. r curly wings
c. What is the genotype of a fruit fly that is homozygous for normal wings? RR
d. What is the genotype of a fruit fly that is homozygous for curly wings? rr
e. What is the genotype of a fruit fly that is heterozygous? Rr
f. Which two genotypes will result in the ‘normal wings’ phenotype? RR and Rr






Slide 23 - Slide

Some fruit flies have curly wings instead of normal wings (see the pictures below). Answer the questions using the letter R for normal wings and r for curly wings:

normal wings                 curly wings
g. Can a fruit fly with normal wings have a homozygous genotype? Yes RR
h. Can a fruit fly with normal wings have a heterozygous genotype? Yes Rr
i. Can a fruit fly with curly wings have a homozygous genotype? Yes rr
j. Can a fruit fly with curly wings have a heterozygous genotype? Explain your thinking. No, because when the dominant allele is present, the fenotype will be dominant





Slide 24 - Slide

Slide 25 - Video

CALCULATE THE CHANCE. 
  
Let's practice! A guinea pig is heterozygous and has blue fur. This guinea pig mates with a guinea pig with yellow fur. Use a punnet square to determine the probability of one of their offspring having blue fur.

Slide 26 - Slide

CALCULATE THE CHANCE. 
  
Let's practice! A guinea pig is heterozygous and has blue fur. This guinea pig mates with a guinea pig with yellow fur. Use a punnet square to determine the probability of one of their offspring having blue fur.
Dominant allele = blue fur
Recessive allele = yellow fur
genotype blue pig = Bb
genotype yellow pig = bb


Slide 27 - Slide

CALCULATE THE CHANCE. 
  
Let's practice! A guinea pig is heterozygous and has blue fur. This guinea pig mates with a guinea pig with yellow fur. Use a punnet square to determine the probability of one of their offspring having blue fur.








F1 genotypes: Bb 50%  bb 50%
F1 phenotypes: blue 50%
                         yellow 50%

Slide 28 - Slide

Homework
21, 22 and 23

Slide 29 - Slide