Cette leçon contient 15 diapositives, avec quiz interactifs et diapositives de texte.
La durée de la leçon est: 90 min
Éléments de cette leçon
Put them in the correct order from big to small.
Chromosome
Gene
Genome (biggest)
Nucleotide
nitrogenous base
Slide 1 - Question de remorquage
Learning objectives
5.8.15 You can describe what homozygous, heterozygous, dominant and recessive mean.
Practical activity 3
You have learned that an allele pair can contain two identical or two different alleles for a certain hereditary characteristic. In a non-identical allele pair, the stronger allele is reflected in the phenotype.
Slide 2 - Diapositive
Geneen allele
gene = piece of DNA that codes for 1 protein = 1 trait
chromosomes are in pairs and thus genes as well
allele = one of the variants of a gene
Slide 3 - Diapositive
Homozygous: both alleles are the same
Heterozygoos:the alleles are different
Slide 4 - Diapositive
dominant allele: allele that is always expressed in the phenotype
A
recessive allele: allele that is only expressed in the phenotype if there is no dominant allele present
a
Slide 5 - Diapositive
Slide 6 - Diapositive
Carrier
Een heterozygous is a carrier of the recessive allele
hair colour or a disease
Slide 7 - Diapositive
Juiste manier van noteren
AA = homozygous dominant
aa = homozygous recessive
Aa = heterozygous
Slide 8 - Diapositive
2 equal alleles for a trait is what we call
A
Homozygous
B
Heterozygous
C
Dominant
D
Recessive
Slide 9 - Quiz
Which characteristic is expressed in a heterozygous individual?
A
the dominant one
B
the recessive one
Slide 10 - Quiz
Pjotr his gene code for hair is Aa. His hair is brown. Is the colour of his hair dominant or recessive?