Extensions of Mendelism Part2
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Biology
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University
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Practice Problem
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Medium
AZMAN FBME
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35 Slides • 17 Questions
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Multiple Choice
Which of the following is NOT an example of a trait determined by multiple alleles?
ABO blood type
Coat color in many species
Eye color in Drosophila
Height in pea plants
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Multiple Choice
The ABO blood type in humans is determined by which of the following combinations of alleles?
IA, IB, i
A, B, O
M, N, S
X, Y, Z
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Open Ended
Explain how the ABO blood group system demonstrates the concept of multiple alleles and codominance.
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Fill in the Blanks
Type answer...
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Multiple Select
Select all statements that correctly describe codominance.
Both alleles are expressed in the heterozygote.
One allele is completely dominant over the other.
No blended phenotype is observed.
Codominance is the same as incomplete dominance.
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Multiple Choice
Which statement best describes codominance as illustrated by the IA and IB alleles?
Both alleles are recessive and not expressed in the phenotype.
Both alleles contribute independently and are simultaneously expressed in heterozygotes.
Only one allele is expressed while the other is silent.
The alleles blend to form an intermediate phenotype.
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Multiple Choice
Which genotypes result in agglutination with both anti-M and anti-N sera?
LM LM
LN LN
LM LN
None of the above
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Open Ended
Explain how the reaction of antigen M with anti-M serum demonstrates the concept of codominance.
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Fill in the Blanks
Type answer...
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Multiple Choice
Match the following rabbit genotypes to their phenotypes: cc, chch, c+c+, chch, cchcch. Which genotype corresponds to the Himalayan phenotype?
cc
chch
c+c+
cchcch
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Open Ended
Describe the differences in coat color phenotypes among wild-type, chinchilla, Himalayan, and albino rabbits as shown in the images.
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Multiple Choice
Which of the following best describes the dominance hierarchy among the alleles for rabbit coat color?
C > cch > ch > c
C > ch > cch > c
c > ch > cch > C
C > c > ch > cch
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Multiple Choice
Which of the following statements about the ABO blood-typing system is correct?
Individuals with genotype ii have blood type O and lack both A and B antigens.
Individuals with genotype IAIB have blood type O.
Individuals with genotype IBIB have both A and B antigens.
Individuals with genotype IAi have blood type AB.
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Multiple Choice
Which genotypes result in blood type A in the ABO blood-typing system?
IAIA or IAi
IBIB or IBi
IAIB
ii
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Fill in the Blanks
Type answer...
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Open Ended
Explain how the genotype of a rabbit determines its coat color, using the allelic series for the c gene.
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Open Ended
What is the difference between a null (amorphic) allele and a hypomorphic allele?
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