U5 B8 2HVTTO

B8 Dominant and recessive
  • Take off your jacket
  • Put your things on your desk
       Book, notebook, pencil case
  • Bag on the floor
  • Read pages 162-163
timer
4:00
Lessongoals
  • You can understand and write out the difference between a heterozygous and homozygous genotype using gene symbols.
  • You can explain the impact of combinations of dominant and recessive alleles on the phenotype.
  • You can make predictions about possible genotypes that can arise in offspring when you know the genotypes of the parents.
  • You can make predictions about possible phenotypes resulting from the resulting genotypes.
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Slide 1: Slide
BiologieMiddelbare schoolhavo, vwoLeerjaar 2

This lesson contains 18 slides, with interactive quizzes, text slides and 1 video.

time-iconLesson duration is: 45 min

Items in this lesson

B8 Dominant and recessive
  • Take off your jacket
  • Put your things on your desk
       Book, notebook, pencil case
  • Bag on the floor
  • Read pages 162-163
timer
4:00
Lessongoals
  • You can understand and write out the difference between a heterozygous and homozygous genotype using gene symbols.
  • You can explain the impact of combinations of dominant and recessive alleles on the phenotype.
  • You can make predictions about possible genotypes that can arise in offspring when you know the genotypes of the parents.
  • You can make predictions about possible phenotypes resulting from the resulting genotypes.

Slide 1 - Slide

Wheel of homework
Go to Lessonup.app and use this code
Reward
Penalty

Slide 2 - Slide

What is the best description of genes and alleles?
A
A gene is in the DNA An allele is on a chromosome
B
a gene is a characteristic an allele is a variant of this characteristic
C
allele and gene are synonymous
D
an allele is a characteristic a gene is a variant of this characteristic

Slide 3 - Quiz

Give an example of a gene

Slide 4 - Open question

Healthy organisms always have 2 alleles of each gene.
Explain why these alleles aren't always the same.

Slide 5 - Open question

Homo- & heterozygous
Homo = same            hetero = different
Homozygous > both alleles for the characteristic are the same 
Heterozygous > alleles of the characteristic are different

Slide 6 - Slide

Dominant and recessive
  • Alleles are either dominant or recessive
  • Dominant is 'stronger' than recessive
  • A dominant trait means dominant for all members of the species
  • Heterozygous genotype > Dominant allele visible in phenotype

Slide 7 - Slide

Flowers of the bean plant can be pink or white.
Plant 1 has white flowers and is heterozygous.
Plant 2 has pink flowers and is homozygous.
Which colour is recessive?

A
White
B
Pink
C
Impossible to know

Slide 8 - Quiz

Cats can have black or red fur colour.
Black is dominant.
What are possible genotypes for a black cat?
A
Always homozygous
B
Always heterozygous
C
Homozygous or heterozygous

Slide 9 - Quiz

Cats can have black or red fur colour.
Black is dominant.
What are possible genotypes for a red cat?
A
Always homozygous
B
Always heterozygous
C
Homozygous or heterozygous

Slide 10 - Quiz

Gene symbols
Alleles are usually shown using a letter.
  • Alleles of the same gene use the same letter
  • Dominant = capital letter,  Recessive = normal letter
  • AA = homozygous dominant
  • aa = homozygous recessive
  • Aa = heterozygous

Slide 11 - Slide

For humans, red hair is dominant over blond hair.
A man is heterozygous for hair colour.
What is his geno- and phenotype?
A
AA and red hair
B
aa and blond hair
C
Aa and red hair
D
Aa and blond hair

Slide 12 - Quiz

A father has genotype AA, the mother Aa.
Which genotypes are possible for their kids?
A
AA, aa en Aa
B
Aa en aa
C
Aa en AA
D
aa en AA

Slide 13 - Quiz

What you should do:
  • Read pages 162-163
  • Do asgmt  1-3 pgs. 163-165
  • Challenge: how it fits together pgs. 156-157,  pgs 145-146 can help

Done with the above?
  • Work on the next chapter(s)
  • Learn for the test 
  • Make other homework
  • Read a book
Zs = Working in Silence
  • No asking questions
  • Silent, don't disturb anyone
  • Stay at your  desk
timer
6:00

Slide 14 - Slide

What you should do:
  • Read pages 162-163
  • Do asgmt 1-3 pgs. 163-165
  • Challenge: how it fits together pgs. 156-157, pgs 145-146 can help

Done with the above?
  • Work on the next chapter(s)
  • Learn for the test 
  • Make other homework
  • Read a book
Zw = Working with whispering
  • Teacher is available for questions
  • Only whisper with the student next to you
  • Stay at your  desk

Slide 15 - Slide

Slide 16 - Video

Slide 17 - Link

Tidy Duty
Today these people are on tidy duty
  • Desks: empty and straight
  • Chairs:  underneath the desks
  • Floor: no rubbish

Slide 18 - Slide