5.1 pass it on!

Chapter 5
 
It runs in 
the family
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Slide 1: Slide
BiologieMiddelbare schoolvwoLeerjaar 2

This lesson contains 22 slides, with interactive quizzes and text slides.

Items in this lesson

Chapter 5
 
It runs in 
the family

Slide 1 - Slide

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Can you roll your tongue?
A
Yes
B
No
C
Kinda

Slide 2 - Quiz

phenotype which is in your genotype

Slide 3 - Slide

phenotype which is allocated in your DNA
Do you have a Widow's peak or a straight hairline?
A
Widow's Peak
B
Straight hairline
C
I have no idea honestly

Slide 4 - Quiz

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Can you turn your tongue?
A
yes
B
no
C
Little bit

Slide 5 - Quiz

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Slide 6 - Slide

phenotype
Attached earlobe or free earlobe
A
Attached
B
Free
C
idk

Slide 7 - Quiz

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5.1 pass it on!

Slide 8 - Slide

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It runs in the family
-How did you inherit characteristics from your parents?
-Why do some inherited characteristics not show?
-What are chromosomes?
-Why do siblings look similar to their parents and each other?

Slide 9 - Slide

- inheriting characteristics from parents
- how gender is determined
- how chomosomes, DNA and genes are related
- how to determine characteristics of offspring from a given combination of parents
- how to read a pedigree
Phenotype
  • All your characteristics = phenotype
  • Phenotype is a combination of: genotype (DNA) and influences from your surroundings


Examples:
  • Hair colour
  • Weight
  • Voice
  • Lung capacity
  • Build of your muscles
  • Size of your feet
  • Blood pressure
  • etc
Examples:
  • The weather
  • How much you eat
  • How much you exercise
  • What you do each day
  • etc.

Slide 10 - Slide

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To inherit = to receive a characteristic from your mom and dad

  • Genotype = complete set of all inherited characteristics. 
  • Phenotype = set of characteristics that are seen/expressed. 

Phenotype = genotype + pattern of gene expression + environmental factors. 
We will learn more about this later this chapter

Slide 11 - Slide

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It runs in the family
How did you inherit characteristics 
from your parents?

Slide 12 - Slide

During fertilisation, the nucleus of the sperm cell fuses with the nucleus of the egg cell. But what is the result of this fusion? A unique, new individual who still looks a bit like both of its parents!
genotype
fenotype

Slide 13 - Slide

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Wat is genotype or fenotype? move traits A till H to genotype or fenotype. 
Genotype
Fenotype
a small nose
straight hair from birth
Piercings 
painted dark hair
a scar
Wibi can play the piano very well
calluses on your hands
blue eyes

Slide 14 - Drag question

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Why do some inherited characteristics not show?
tan

Slide 15 - Slide

For example: you may have inherited a tendency to tan quickly while sunbathing, but if you leave your socks on, the skin on your feet will stay pale (see figure 5.2).
Human cell

There are 23 chromosomes in a female egg cell.
In a male sperm cell are 23 chromosomes present


Egg + sperm = a fertilized egg cell has 46 chromosomes







What are chromosomes?

Slide 16 - Slide

What are chromosomes?

 homologous pairs.
karyotype
- picture of all your 46 chromosomes
- 23 homologous pairs (1 from dad and 1 from mum)
- 22 pairs of autosomal chromosomes
- 1 pair of sex chromosomes XX or XY

Slide 17 - Slide

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Slide 18 - Slide

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so why do siblings differ?

Slide 19 - Slide

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So why do siblings differ?

Slide 20 - Slide

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Ancestry = bloodline

Slide 21 - Slide

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homework
study 5.1  & do exercises 

Slide 22 - Slide

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