11.2 complex patterns of inheritance
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Éléments de cette leçon
Slide 1 - Diapositive
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Slide 5 - Diapositive
In petunias there are three flower colours. The colour is determined by two alleles: one for white flowers and one for purple flowers. In the phenotypes we can find white and purple, but also pink. A petunia with pink flowers is crossed with a petunia with white flowers. Show the punnett square and the colours you expect in the offspring.
Slide 6 - Question ouverte
The breeder performs countless crosses with the same two petunias. From this cross he gets 74 pink petunias, 38 white petunias and 37 purple petunias. What is true about the parent plants?
A
one is white, the other purple
B
one is white, the other pink
C
one is purple, the other pink
D
both are pink
Slide 7 - Quiz
Slide 8 - Vidéo
Slide 9 - Diapositive
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Slide 11 - Diapositive
In cattle there are three coat phenotypes: white, roan and red. A white cow is crossed with a bull with a red coat. All offspring has a roan coat.
Show the punnett square that explains these phenotypes.
Show the punnett square that explains these phenotypes.
Slide 12 - Question ouverte
See previous cross. Two of the roan offspring from the F1 cross are crossed with each other. Give the phenotype ratios you expect from this F2 cross.
Show it with a punnett square.
Show it with a punnett square.
Slide 13 - Question ouverte
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- Why do you think sickle cell anemia occurs more often in areas where malaria is endemic?
- A man and a woman are both heterozygous for sickle cell anemia are having a child. What are the chances that the child is protected against malaria? Draw a Punnett square to explain.
- A man and a woman are both heterozygous for sickle cell anemia are having a child. What are the chances that the child is protected against malaria? Draw a Punnett square to explain.
Slide 17 - Question ouverte
Slide 18 - Diapositive
Slide 19 - Vidéo
Slide 20 - Diapositive
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Slide 23 - Diapositive
Which genotype(s) will lead to blood group B?
Slide 24 - Question ouverte
A person has blood group A. Of which genotype can this person NOT receive blood in a transfusion?
A
IAIA
B
IAi
C
IAIB
D
ii
Slide 25 - Quiz
Complete on paper and hand in picture:
A person with blood group 0 has a child with a person with blood group AB. What is the chance this child will have blood group A?
A person with blood group 0 has a child with a person with blood group AB. What is the chance this child will have blood group A?
Slide 26 - Question ouverte
Complete on paper and hand in picture:
In a family both grandmothers have blood group 0 and both grandfathers have blood group AB.
Calculate the chance of their grandchild getting blood group B.
In a family both grandmothers have blood group 0 and both grandfathers have blood group AB.
Calculate the chance of their grandchild getting blood group B.
Slide 27 - Question ouverte
Lethal alleles:
In the crested canary the presence of the crest is determined by one gene. The allele for a crest is dominant. In the case of a homozygous dominant canary-embryo this leads to malformations during embryonic development and the death of the embryo. Two heterozygous canaries are crossed. What is the of the first offspring to have no crest?
In the crested canary the presence of the crest is determined by one gene. The allele for a crest is dominant. In the case of a homozygous dominant canary-embryo this leads to malformations during embryonic development and the death of the embryo. Two heterozygous canaries are crossed. What is the of the first offspring to have no crest?
A
0%
B
25%
C
33%
D
50%
Slide 28 - Quiz
Lethal alleles:
In the crested canary the presence of the crest is determined by one gene. The allele for a crest is dominant. In the case of a homozygous dominant canary-embryo this leads to malformations during embryonic development and the death of the embryo. Two heterozygous canaries are crossed. What is the chance of the first and second offspring to have no crest?
In the crested canary the presence of the crest is determined by one gene. The allele for a crest is dominant. In the case of a homozygous dominant canary-embryo this leads to malformations during embryonic development and the death of the embryo. Two heterozygous canaries are crossed. What is the chance of the first and second offspring to have no crest?
A
0%
B
11%
C
33%
D
66%
