he four commón blood groups of the human 'ABO blood group that is unable to make any changes to the basic antigen (sugar system' are determined by three alleles: A, B, andO (also molecule. The other two alleles (A, B) are codominant and are represented in some textbooks as: 4, 1º, and 1° or just ). This is expressed equally. They each produce a different functional an example of a multiple allele system for a gene. The ABO enzyme that adds a different, specific sugar to the basic sugar antigens consist of sugars attached to the surface of red blood molecule. The blood group A and B antigens are able to react cells. The alleles code for enzymes (proteins) that join together with antibodies present in the blood from other people and must these sugars. The allele O produces a non-functioning enzyme be matched for transfusion. Recessive allele: O produces a non-functioning protein Dominant allele: A produces an enzyme which forms A antigen Dominant allele: B produces an enzyme which forms B antigen Frequency Blood group Possible (phenotype) genotypes whte Native American Badk 00 45% 49% 79% If a person has the AO allele combination then their blood group will be group A. The presence of the recessive allele has no effect on the blood group in the presence of a dominant allele. Another possible allele combination that can create the same blood group is AA. A AA AO 40% 27% 16% в 11% 20% 4% 1. Use the information above to complete the table for the possible genotypes for blood group B and group AB. AB 4% 4% 1% don N 2. Below are six crosses possible between couples of various blood group types. The first example has been completed for you. Complete the genotype and phenotype for the other five crosses below: Blood Blood Blood Cross 1 Blood group O group: AB group: AB group: 0 Cross 2 Parental

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Se www.on ican webteMSTUARTL
192
Inheritance
AO Multiple Alleles in Blood Groups
The four common blood groups of the human 'ABO blood group
system' are determined by three alleles: A, B, and o (also
represented in some textbooks as: 1ª, 1®, and ¡º or just i). This is expressed equally. They each produce a different functional
an example of a multiple allele system for a gene. The ABO enzyme that adds a different, specific sugar to the basic sugar
antigens consist of sugars attached to the surface of red blood molecule. The blood group A and B antigens are able to react
cells. The alleles code for enzymes (proteins) that join together with antibodies present in the blood from other people and must
these sugars. The allele O produces a non-functioning enzyme
that is unable to make any changes to the basic antigen (sugar
molecule. The other two alleles (A, B) are codominant and are
be matched for transfusion.
Recessive allele: O produces a non-functioning protein
Dominant allele: A produces an enzyme which forms A antigen
Dominant allele: B produces an enzyme which forms B antigen
Blood group
Possible
Frequency
(phenotype) genotypes white BlackNative
American
00
45% 49% 79%
If a person has the AO allele combination then their blood group will be
group A. The presence of the recessive allele has no effect on the blood
group in the presence of a dominant allele. Another possible allele
combination that can create the same blood group is AA.
A
AA AO 40% 27% 16%
B
11% 20% 4%
1. Use the information above to complete the table for the possible
genotypes for blood group B and group AB.
AB
4%
4%
1%
Fregncy a based on Norh
2. Below are six crosses possible between couples of various blood group types. The first example has been completed
for you. Complete the genotype and phenotype for the other five crosses below:
Blood
Blood
group: AB
Blood
group: O
Cross 1
Blood
group: 0
group: AB
Cross 2
Parental
genotypes
AB
00
Gametes
Possible
fertilizations
Children's
genotypes
AA
AB
AB
BB
Blood
groups
АВ
АВ
B
Blood
Blood
Blood
Blood
group: B
group: AB
Cross 3
group: A
group: A
Cross 4
Parental
AB
AO
genotypes
AA
BO
Gametes
Possible
fertilizations
Children's
genotypes
Blood
Transcribed Image Text:Se www.on ican webteMSTUARTL 192 Inheritance AO Multiple Alleles in Blood Groups The four common blood groups of the human 'ABO blood group system' are determined by three alleles: A, B, and o (also represented in some textbooks as: 1ª, 1®, and ¡º or just i). This is expressed equally. They each produce a different functional an example of a multiple allele system for a gene. The ABO enzyme that adds a different, specific sugar to the basic sugar antigens consist of sugars attached to the surface of red blood molecule. The blood group A and B antigens are able to react cells. The alleles code for enzymes (proteins) that join together with antibodies present in the blood from other people and must these sugars. The allele O produces a non-functioning enzyme that is unable to make any changes to the basic antigen (sugar molecule. The other two alleles (A, B) are codominant and are be matched for transfusion. Recessive allele: O produces a non-functioning protein Dominant allele: A produces an enzyme which forms A antigen Dominant allele: B produces an enzyme which forms B antigen Blood group Possible Frequency (phenotype) genotypes white BlackNative American 00 45% 49% 79% If a person has the AO allele combination then their blood group will be group A. The presence of the recessive allele has no effect on the blood group in the presence of a dominant allele. Another possible allele combination that can create the same blood group is AA. A AA AO 40% 27% 16% B 11% 20% 4% 1. Use the information above to complete the table for the possible genotypes for blood group B and group AB. AB 4% 4% 1% Fregncy a based on Norh 2. Below are six crosses possible between couples of various blood group types. The first example has been completed for you. Complete the genotype and phenotype for the other five crosses below: Blood Blood group: AB Blood group: O Cross 1 Blood group: 0 group: AB Cross 2 Parental genotypes AB 00 Gametes Possible fertilizations Children's genotypes AA AB AB BB Blood groups АВ АВ B Blood Blood Blood Blood group: B group: AB Cross 3 group: A group: A Cross 4 Parental AB AO genotypes AA BO Gametes Possible fertilizations Children's genotypes Blood
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