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BiologieMiddelbare schoolhavo, vwoLeerjaar 3

This lesson contains 22 slides, with text slides.

time-iconLesson duration is: 45 min

Items in this lesson

HAVE READY
  • JOIN THIS LESSONUP
  • YOUR NOTEBOOK
  • KERBOODLE PAGE 256
  • GOOGLE CLASROOM

Slide 1 - Slide

CATCH UP -Reebob lesson
See Magister:
  • Location: ROOM 015

  • Monday 11 apr 16:00 - 16:45

Slide 2 - Slide

CHAPTER 16
INHERITANCE

Slide 3 - Slide

  • I know what selective breeding is and how it is used to benefit humans.
  • I know what genetic engineering is and can name and explain various examples.
  • I know what transgenesis is and can name and explain various examples.
  • I know what CRISPR is and can name and explain various examples.


  • SELECTIVE BREEDING
  • GENETIC ENGINEERING
  • GENE THERAPY
  • TRANSGENESIS
  • CRISPR

Slide 4 - Slide

QUIZ LESSON 1-5
INHERITANCE

Slide 5 - Slide

IDENTICAL TWINS
Figure 1 shows a picture of Dresie and Casie from West-Transvaal, South-Afrika: white identical twins. Two claims are made about these twins:


1. the difference between the ears of Dresie and Casie was already present at birth, therefore this difference is part of the genotype 
2. these twins have the same blood type. 
 
1. Explain which claim or which claims are true?


Slide 6 - Slide

IDENTICAL TWINS
1. Explain which claim or which claims are true?

Since Dresie and Casie are identical twins their genotype is identical, therefore the difference between the ears cannot be genetic (1p)  (maybe due to birth) and their blood type has to be identical (1p). Therefor, claim 2 is correct. 

Slide 7 - Slide

IDENTICAL TWINS
Tongue rolling
People who are capable of rolling their tongue (see figure 2) possess allele R. A person who can’t roll his tongue (rr) has two sisters who can roll their tongue. Both parents are also capable of rolling their tongue. 

2 What are the possible genotypes of both the parents and 
T2 the sisters?



Slide 8 - Slide

Steps with Punnet Squares
  1. Identify your 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 9 - Slide

IDENTICAL TWINS
2 What are the possible genotypes of both the parents and 
T2 the sisters?


Slide 10 - Slide

LABRADORS
Snout colour of Labradors
A certain gene determines the snout colour of Labrador dogs. This gene can cause the snout to be black or brown coloured. A male dog homozygous for brown snout colour copulates with five homozygous black female dogs. All puppy’s which are born (F1) from these crossings are interbred. From this interbreeding many puppies are born (F2). Determine the chance for a puppy in F2 to have a brown snout. 

3 Determine the probability for a puppy in F2 to have a brown snout. (Remember to use and show your 6 steps!)



Slide 11 - Slide

Steps with Punnet Squares
  1. Identify your 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 12 - Slide

LABRADORS
3 Determine the probability for a puppy in F2 to have a brown snout. (Remember to use and show your 6 steps!)



Slide 13 - Slide

CANARIES
Canaries can carry an allele which is inherited X-chromosomal recessive. Embryos without an allele E die before being born. In these canaries, unlike in humans, males have two X chromosomes and females have one X and one Y. A female canary mates with a homozygous canary male.
  
5. Determine the change that the first male canary chick is heterozygous for this
I trade.

Slide 14 - Slide

Steps with Punnet Squares
  1. Identify your 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 15 - Slide

CANARIES
4 Determine the chance that the first male canary chick is heterozygous for this characteristic. (Remember to use and show your 6 steps!)


Slide 16 - Slide

ALBINOS
In animals, a rare disease called albinism results in the absence of pigment in cells. This leads to a specific phenotype where the organism lacks fur or skin colour. In humans the allele for albinism is recessive and linked to the X-chromosome (Xa). An albino male and a female heterozygous for this allele are getting children. 
 Determine the chance that their first born is an albino girl.
( 6 steps!)

Slide 17 - Slide

Steps with Punnet Squares
  1. Identify your 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 18 - Slide

ALBINOS
Determine the chance that their first born is an albino girl.


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SEX CHROMOSOMES
Which of the following statements on sex chromosomes is correct? 
(Just choose a letter, no explanation required!)

 A Sex chromosomes are only present in egg and sperm cells.
B All chromosomes in egg and sperm cells are sex chromosomes.
C Sex chromosomes are present in all cells.


Slide 20 - Slide

SEX CHROMOSOMES
Which of the following statements on sex chromosomes is correct? 
(Just choose a letter, no explanation required!)

 A Sex chromosomes are only present in egg and sperm cells.
B All chromosomes in egg and sperm cells are sex chromosomes.
C Sex chromosomes are present in all cells.


Slide 21 - Slide

HOMEWORK FOR LESSON 9:
  • COMPLETE THE LESSONUP HW9
  • WRITE A SHORT SUMMARY OF THE KEYWORDS COVERED TILL NOW

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