YR3-K16-LSN2

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  • JOIN THIS LESSONUP
  • YOUR NOTEBOOK
  • KERBOODLE PAGE 247
  • GOOGLE CLASROOM
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Slide 1: Slide
BiologieMiddelbare schoolhavo, vwoLeerjaar 3

This lesson contains 26 slides, with interactive quizzes and text slides.

Items in this lesson

HAVE READY
  • JOIN THIS LESSONUP
  • YOUR NOTEBOOK
  • KERBOODLE PAGE 247
  • GOOGLE CLASROOM

Slide 1 - Slide

PLAN FOR TODAY:
  • CHECK IN CLASS ASSIGNMENTS LESSON 1
  • HW FOR LESSON 2 (ANY QUESTIONS)
  • PRACTICE QUESTIONS
  • IN CLASS ASSIGNMENTS LESSON 2

Slide 2 - Slide

PRACTICE ASSIGNMENTS
INHERITANCE

Slide 3 - Slide

ASSIGNMENTS DURING LESSON 1

  • CHECK THE ANSWERS
  • ASK QUESTIONS 

Slide 4 - Slide

  • I know what heterozygous and homozygous genes are and I can explain the difference.
  • I know what genotype and phenotype is and I can explain the difference.
  • I understand and can explain the difference between dominant & recessive genes.
  • I can use a punnet square to show the inheritance of certain genes.


  • HETEROZYGOUS
  • HOMOZYGOUS
  • DOMINANT
  • RECESSIVE
  • ALLELES
  • GENOTYPE
  • PHENOTYPE
  • PUNNET SQUARES

KERBOODLE P. 246-252

Slide 5 - Slide

Karyograms:
A
left male right female
B
left female right female
C
left male right male
D
left female right male

Slide 6 - Quiz

Someone doesn't look very happy. This is determined by:
A
the hair
B
fenotype
C
genotype
D
environment

Slide 7 - Quiz

Someone has bloodtype AB, this is determined by:
A
the hair
B
fenotype
C
genotype
D
environment

Slide 8 - Quiz

Genes, alleles, loci en homologous chromosomes
A gene holds information for a type of protein. these proteins together result in (genetic) characteristics.

Each gene lays on a specific spot in the genome called a locus ( mv: loci)

Each gene can have different variants called alleles.

Because a diploid organism has two chromosomes of each pair (homologous chromosome), each diploid organism has  2 loci for each gene which can contain similar or different alleles. 

Slide 9 - Slide

Two alleles per gene/locus
Two similar alleles for a gene?  HOMOZYGOUS

Two different alleles for a gene? HETEROZYGOUS

Slide 10 - Slide

Check the image.

What is true?

This organism is .....
A
homozygote for the left gene heterozygote for the gene in the middle heterozygote for the right gene
B
heterozygote for the left gene heterozygote for the gene in the middle homozygote for the right gene
C
homozygote for the left gene homozygote for the gene in the middle heterozygote for the right gene
D
homozygote for the left gene heterozygote for the gene in the middle homozygote for the right gene

Slide 11 - Quiz

Practice assignments in class: #1
Someone's gender is also genetic, in this case I mean the sex you are born with and not the gender you identify with.
a. What alleles/chromosome exist in terms of gender? 
b. What are the parents genotypes? and possible gametes?
c. Show the possible crosses in a punnet squares.
d. What possible outcomes are there. 

Slide 12 - Slide

Steps with Punnet Squares
  1. Identify the alleles.
  2. Identify genotype parent 1. Show possible gametes.
  3. Identify genotype parent 2. Show possible gametes.
  4. Fill in your punnet squares.
  5. Write down ratios of the possible genotypes.
  6. Write down ratios of the possible phenotypes.

Slide 13 - Slide

Practice assignments in class: #2
With Labradors the chocolate colour is dominant and the blond colour is recessive. Work through all the steps you just wrote down to give me a prediction of the offspring of two chocolate labradors that both have heterozygous genes. Work using the letter B.

Slide 14 - Slide

Monohybrid crossing- example
The gene for black coat color is inherited in a dominant way. Two heterozygous black dogs mate. What is the change of getting brown dogs?

Slide 15 - Slide

Monohybrid crossing- example
How to start? 
  1. meaning of the alleles
Black =dominant = A
Brown= recessive = a


The gene for black coat color is inherited in a dominant way. Two heterozygous black dogs mate. What is the change of getting brown dogs?

Slide 16 - Slide

Monohybrid crossing- example
How to start? 
  1. meaning of the alleles
Black =dominant = A
Brown= recessive = a
2. Genotype of parents
     dad = heterozygous = Aa
mom  = heterozygous = Aa 



The gene for black coat color is inherited in a dominant way. Two heterozygous black dogs mate. What is the change of getting brown dogs?

Slide 17 - Slide

Monohybrid crossing- example
How to start? 
1. Meaning of the alleles
2. Genotype of parents
3. What are the possible gametes
4. Punnett square


The gene for black coat color is inherited in a dominant way. Two heterozygous black dogs mate. What is the change of getting brown dogs?

Slide 18 - Slide

Punnett squares
possible gametes of parents A, a (dad) en A , a (mom) along the sides (gray)
in cells the combination of the both gametes


Slide 19 - Slide

Monohybrid crossing- example
How to start? 
1. Meaning of the alleles
2. Genotype of parents
3. What are the possible gametes
4. punnett square
5. ratio of genotypes 
6. ratio of fenotypes



The gene for black coat color is inherited in a dominant way. Two heterozygous black dogs mate. What is the change of getting brown dogs?

Slide 20 - Slide

Punnett squares
ratio genotype = AA : Aa : aa        ratio phenotype bruine vacht : blonde vacht
                                  1   :  2  :  1                                                          3        :        1

example
change that sperm cell contains recessive allele: 1/2
change that egg cell contains recessive allele: 1/2
change that the zygote contains both recessive alleles 1/2 * 1/2 := 1/4

Slide 21 - Slide

Rules for punnett squares
Use letter with a clear difference in capital and normal: Rr, Tt, Ee, Aa, Bb

Parent generation = P - From latin "Parentes" / English "Parent"

Offspring =  F1 - F  from latin "Filii " = children 
                                                   1   indicates the generation 
                                                   (F1 = 1e generation, F2 = 2e generation, etc)


Slide 22 - Slide

A man who is heterozygous for the earlobe gene gets a child together with a female who has fixed earlobes (recessive)
Calculate the ration of this child having fixed earlobes. follow all the steps and upload your answer including a punnett square here.

Slide 23 - Open question

ASSIGNMENTS FOR LESSON 2:

  • practise with question 4, 8, 9 and 10 on page 262-263 in kerboodle
  • Make the in class assignments for lesson 2

Slide 24 - Slide

Exit TICKETS:
  • Complete the KWIZL "ET_CH16_LSN2"
  • Grade your own  work.
  • Reflect on your own work. 
timer
20:00

Slide 25 - Slide

HOMEWORK FOR LESSON 3:
  • STUDY THE WRTS LSN 1-3
  • COMPLETE THE HW FOR LESSON 3
  • COMPLETE ANY IN CLASS ASSIGNMENTS LEFT FROM THIS LESSON IN YOUR NOTEBOOK
  • DOUBLE CHECK YOU UNDERSTAND EVERYTHING

Slide 26 - Slide