DNA and Genetics - Chapter 3
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Lesson duration is: 45 minItems in this lesson
Slide 1 - Slide
Slide 2 - Slide
Slide 3 - Slide
Slide 4 - Slide
Slide 5 - Slide
Jan has one allele for a long middle finger and one allele for a short middle finger.
Jan is ... for middle finger lenght.
Jan is ... for middle finger lenght.
A
Homozygous
B
Heterozygous
Slide 6 - Quiz
Paul has two alleles for blonde hair.
Paul is ... for hair colour.
Paul is ... for hair colour.
A
Homozygous
B
Heterozygous
Slide 7 - Quiz
Guinea pigs can have short or long hair. A long-haired guinea pig and a short-haired guinea pig have a nest of babies. They only have long-haired babies. The babies are ... for hair length.
A
Homozygous
B
Heterozygous
Slide 8 - Quiz
Slide 9 - Slide
Slide 10 - Slide
Slide 11 - Slide
Joe is heterozygous for hair colour. What is his genotype for hair colour?
A
AA
B
Aa
C
aa
Slide 12 - Quiz
Matt is homozygous recessive for finger length. What is his genotype for finger length?
A
BB
B
Bb
C
bb
Slide 13 - Quiz
Karl is homozygous dominant for earlobe form. What is his genotype for earlobe form?
A
EE
B
Ee
C
ee
Slide 14 - Quiz
Slide 15 - Video
What is the difference between a gene and an allele?
Slide 16 - Open question
Dominant allele
recessive allele
an allele that is always expressed in the phenotype
an allele that is only expressed in the phenotype if there is no dominant allele present
Slide 17 - Drag question
Two black dogs have puppies. All puppies are white. Which of the alleles is dominant? And what is the genotype of the parents?
A
White allele; BB
B
Black allele; BB
C
White allele; Bb
D
Black allele; Bb
Slide 18 - Quiz
Which of the alleles is dominant? Ralph is heterozygous for hair colour. His hair is black.
A
Black hair
B
Brown hair
C
Blond hair
Slide 19 - Quiz
Which of the alleles is dominant? Hanna has blue eyes. Her father and mother had brown eyes.
A
Brown eyes
B
Blue eyes
Slide 20 - Quiz
Which of the alleles is dominant? A white horse is heterozygous for hair colour.
A
Black hair
B
White hair
