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BS1 - Genotype and Phenotype
Today's lesson
1. Introduce new topic: Heredity and evolution
2. Review DNA
3. Discuss Genotype and Phenotype
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Today's lesson
1. Introduce new topic: Heredity and evolution
2. Review DNA
3. Discuss Genotype and Phenotype
Slide 1 - Tekstslide
Slide 2 - Video
Hereditary information
Cells that make up your body are called body cells.
Nucleus of each body cell contains 46 chromosomes - thin threads
Chromosomes consist largely of DNA.
DNA stores infromation for your hereditary characteristics
Nuclei of human cells have 46 chromosomes.
Slide 3 - Tekstslide
All cells created by cell division - single, fertilized ovum
Every time a cell divides it copies it's chromosomes are copied first.
A daughter cell is made - it contains a complete set of chromosomes.
Every body cell contains the same information
Slide 4 - Tekstslide
Example:
Trait : Hair color - brown
Gene : part of the DNA carrying the info for this trait
Variations in this gene: blond, brown, red, black
Mother's hair : blond x Father's hair : brown
You : one gene (blond) x one gene (brown) = Brown hair
Slide 5 - Tekstslide
Genotype
complete set of your inherited characteristics
Contains information about thousands of characteristics
gene - pieces of DNA for a characterisistc
genes can be active or inactive
Phenotype
your appearance
seen from the 'outside'
combination of genotype + environmental factors
Slide 6 - Tekstslide
Slide 7 - Video
genotype and phenotype
Slide 8 - Tekstslide
Do Now:
Read 5.1
DO Qs 6 t/m 8 and pg. 105
Slide 9 - Tekstslide
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