5.2 what are the chances?

5. It runs in the family
5.2 What are chances?
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BiologieMiddelbare schoolvwoLeerjaar 3

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5. It runs in the family
5.2 What are chances?

Slide 1 - Diapositive

today''s program 
Make exercises 5.1 workbook
Go to lessonup and use the lesson 5.2
Make notes in your notebook
Make exercises 5.2

Slide 2 - Diapositive

Learning objectives
learning objectives: you can 
- explain the difference between autosomes and sex-chromomes, between somatic cells and sex cells (games 
- explain how the gender of a baby is determined
- describes the diffences between the chromosomes of a sperm cell and an egg cel 

Slide 3 - Diapositive

how did you inherit characteristics from your parents?

Slide 4 - Question ouverte

why do some inherited characteristics not show?

Slide 5 - Question ouverte

what are chromosomes and what do they contain?

Slide 6 - Question ouverte

why do siblings look similar to their parents and each other?

Slide 7 - Question ouverte

cells and chromosomes
humans have: 
somatic cells : 'body cells', 46 chromosomes, 23 pairs of chromosomes, diploid cells 

gametes : 'sex cells' (egg cells, sperm cells), 23 single chromosomes, haploid cells 

Slide 8 - Diapositive

cells and chromosomes
humans have in EACH somatic cell: 
  • 22 pairs of autosomes
  • 1 pair of sex chromosomes : X X = female, XY=male 

so, humans have in EACH gamete:
  • 22 autosomes
  • 1 sex chromosome


Slide 9 - Diapositive

questions...
  • How many sex chromosomes are there to be found in a gamete? 
  • What are the chances of having a baby girl of baby boy?
  • Who is ‘responsible’ for the gender of a baby: the mother, the father or both?

Slide 10 - Diapositive

huiswerk
learn par. 5.2
do exercises workbook 5.2

Slide 11 - Diapositive

questions...
  • How many sex chromosomes are there to be found in a gamete? 
  • What are the chances of having a baby girl of baby boy?
  • Who is ‘responsible’ for the gender of a baby: the mother, the father or both?

Slide 12 - Diapositive