Biology genetics question blood types

Biology
Tutor: None Selected Time limit: 1 Day

Use your knowledge of the inheritance patterns of the ABO blood types to answer the following question. If a mother is blood type AB and produces a child with blood type AB. List the possible genotypes of the father. Which genotype(s) is (are) not possible? Explain why.

Dec 3rd, 2015

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ABO inheritance.docx

Using what we know about ABO Inheritance, a mother with AB blood type, or IAIB, whose offspring is also of the AB or IAIB genotype, must have a breeding partner with blood type BB (IBIB) (homozygous),  BO (IBIO) (heterozygous), AA (IAIA) (homozygous), or AO (IAIO) . The father can not be of blood type O or IiIi (IoIo). Referring to our Punnett squares all crosses yield at least a 25% chance of AB (heterozygous AO and BO) up to a 50% chance (homozygous AA BB, as well as AB). The O cross yields 0% chance for an AB offspring and is thus not a statistically valid possibility for the fathers genotype.

A

B

B

AB

BB

B

AB

BB

A

B

B

AB

BB

O

AO

BO

A

B

O

AO

BO

O

AO

BO

A

B

A

AA

BA

A

AA

BA

A

B

A

AA

BA

B

AB

BB

A

B

A

AA

BA

O

AO

BO



Please let me know if you need any clarification. I'm always happy to answer your questions. The attached file is word based and should be viewable across all operating systems.
Dec 3rd, 2015

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