WorksheetsMULTIPLE ALLELES
Total questions: 16
Worksheet time: 3mins
What are the 4 possible phenotypes for human blood type?
Type A
Type B
Type BB
Type AB
Type O
What 3 alleles are responsible for the phenotypic expression of ABO Blood types?
IA
IB
ID
i
What determines blood types in humans?
(a)
What antigen is present on the surface of Red Blood Cells of a type A person?
(a)
What antigen is present on the surface of Red Blood Cells of a type B person?
(a)
What antigen is present on the surface of Red Blood Cells of a type AB person?
(a)
What antigen is present on the surface of Red Blood Cells of a type O person?
(a)
Why can someone with type O blood donate blood to everyone?
because type O blood does have antigens A and B.
because it doesn't have A or B antigens that would cause it to be attacked by antibodies.
Why can people with AB Blood accept blood from anyone?
because they don't have any antigens at all
because they have already both A and B antigens.
What pattern of non-Mendelian inheritance is shown by ABO blood group?
Codominance
Incomplete Dominance
Multiple Alleles
X-linked
If a person has type B blood, the phenotype is B. What can the genotype be?
IBIB or IBi
IAIA or IAi
IAIB
ii
If a person has type A blood, the phenotype is A. What can the genotype be?
IBIB or IBi
IAIA or IAi
IAIB
ii
If a person has type AB blood, the phenotype is AB. What can the genotype be?
IBIB or IBi
IAIA or IAi
IAIB
ii
If a person has type O blood, the phenotype is O. What can the genotype be?
IBIB or IBi
IAIA or IAi
IAIB
ii
if the father is type A and the mother is type B, in order for baby Sylvester to have the genotype ii, his parents must be?
heterozygous
homozygous
There are multiple alleles for the ABO blood group. Why are only two of these alleles present in any one individual?
Each parent contributes only one allele for the ABO blood group to the offspring.
There are not enough nucleotides in a red blood cell to produce a third allele.
Each allele in the ABO group must be dominant or recessive
Blood group alleles are not segregated during meiosis.
