Question

5. A man whose blood type is B, and whose mother was type O, marries a woman with type A, whose father was type O. What are the genotype for the man and his wife and the genotypes and phenotypes of any offspring?

Show cross.

Man’s Mother genotype: Woman’s father’s genotype:

Man’s genotype: X Woman’s genotype:

Offsprings phenotype ( blood type)

6. A man, whose blood type is A and whose mother had blood type O marries a woman whose blood type B and whose parents had blood type AB. What are the genotypes of the man and woman and the genotypes and phenotypes of their children.

Show cross.

Man’s Mother genotype: Woman’s parents genotypes:

Man’s genotype: X Woman’s genotype:

Offsprings genotype:

Offsprings phenotype ( blood type):

Answer 1

Q5. Blood group of Man = B

Since the mother of the man had Blood group O (IoIo), Therefore the man will have the following genotype IBIo (IB from Father and Io from Mother).

Blood group of woman = A,

Since the father of the woman had Blood group O (IoIo), Therefore the woman will have the following genotype IAIo (Io from Father and IA from Mother).

Now    IBIo   x    IAIo

  Gametes ---->   IB Io IA Io

  Offsprings --->    IAIB     IBIo IA​​​​​​​Io Io​​​​​​​Io

(AB) (B) (A) (O)

Q6.  

Blood group of Man = A

Since the mother of the man had Blood group O (IoIo), Therefore the man will have the following genotype IAIo (IA from Father and Io from Mother).

Blood group of woman = B

Since the parents of the woman had Blood group AB (IAIB​​​​​​​), Therefore the woman will have the following genotype IBIB (IB from Father and IB from Mother)

Now    IAIo   x    IBIB

  Gametes ---->   IA Io IB   

  Offsprings ---> IAIB     IBIo   

(AB) (B)   

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