Question

1. In humans the allele for A type (I_A) blood and B type blood (I_B)show co-dominance, so that a person with both alleles has blood type AB (phenotype).  Both A and B alleles are dominate to the allele for O (i). A person with an allele for type A blood and an allele for type o blood marries someone with an allele for type B blood and an allele for type o blood.  List the types of offspring they could have and the probability for each blood type in the offspring.Make sure you use the correct allele designations & show the proportions of both genotypes and phenotypes in the offspring.

What kind of offspring would result from parents of type A (homozygous) and type B (heterozygous) blood?Make sure you use the correct allele designations & show the proportions of both genotypes and phenotypes in the offspring.

A mother has blood type O, her child is type O.  She claims that a man with a blood type of AB is the father.  Could he be?  Why or Why not?

Two pair of twins were born at a hospital one night within a few moments of one another. Somehow the staff forgot to put name tags on the babies and now they don’t know which babies belong to which parents.  Help them out by analyzing the blood types of both parents and babies to see who should be sent home together.

Mrs. Smith is blood type A and her husband is blood type B.

Mrs. Abernathy is blood type O and her husband is blood type AB.  

All four babies are girls:

Baby 1 is type O

Baby 2 is type A

Baby 3 is type B

Baby 4 is type AB

Explain how you decided which babies went home with each couple.

b.Suppose a child is of the blood type A and the mother is of type O.  What genotype or genotypes may the father belong to? Make sure you use the correct allele designations for genotypes.

c. Suppose a father of blood type A (heterozygous) and a mother of blood type B (heterozygous) have a child of type O.  What are the parent’s genotypes and what other blood types would be possible in their future offspring?Make sure you use the correct allele designation & show the proportions of both genotypes and phenotypes in the offspring.

d.Suppose a father of blood type B (heterozygous) and a mother of blood type O have a child of type O.  What are the chances that their next child will be blood type O? Type B? Type A? Type AB? Make sure you use the correct allele designation

e. Codominance (often lumped with incomplete dominance) in cattle.  RR = red hair, rr = white hair, Rr = roan hair (red hairs and white hairs)

Cross a red bull with a white cow.  Give the phenotypic and genotypic possibilities of this cross.Make sure you use the correct allele designation & show the proportions of both genotypes and phenotypes in the offspring.

Answer 1

I have 3 different alleles O A ③ B ③ i A and B both are dominant (codominance) - due to formation of antigen L is recessene due to no founation of antigen . Саемонро - Phenotype IAIA a IA IºIº ou Iºi IA IB

TD Parent , - Type A blood will allele = A0 (genotype) I^i Parent 2 - Type B blood with allele o = 30 (genotypu ) 1% i IB í TAB ellsoning is AB Iie- offspring is also TATABIAI TAI - offspring is A Til I i - offspring is 3 i - offspring is o * There is 25% of probability that offspring will have either of the blood groups A, B, AB a O. ang will () Parent type A ( Homozygous) = AA OL I^I^ genotype Parent type B (heterozygous) = BO a IB i genotype Ia Intel Iri ) I^Iº = offspring has type AB IA 17 I i I" i = offspring has Type A & - There is 50% chances the offspring wille he type AB or type A blood !

(1) motu has Blood typu o genotypu (ii) Child is Blood type o genotype (1) Blood type of father canna be AB, since the offspring is blood type o, it has recessive allele in which cannd we seen in type Ablood. The fathe's Mood should either be ŏ , AaB but cannot be AB because it does not have the o allele in it . Mrs Smith type A blood and husband is B. IN ) (IBI) In ingeri i Bilii , Baby I and baby 4 is of this , Couple (type o (ii) and 'In 18) w for AB) Mrs Abernathy is type o and husband is (AB) Tлте TAB INIB 1 Baby 2 and 3 are of this couple. In i will show type A blood and B i show type B. (b) Child is blood typu A and mother so. Fathw will have eithu I^I^ genotypu ou I^i genotype which will give offspring A due to A type being dominant

(() Patw Lubwoord 1.jpe Al betowegous) ie !" Ovid mothw loppu B( helisygous ) ie I'l One child is O type therefore the hest will be A, B and AB i will be type o 251. Chanes for each I i will me type A of the wood typu . I' i will the type B INTB will be type AB (d) Farrew typu Blheterozygous) - Bi mother typu olhomozygous)-ii rre : rºi - type B ili u Bi- type B iu - type o ü - type o A They are sol chances of offspring to be type o and type B .. Codominance Cross utween red bull (RR) and x white cow (v) (Rr) All the offspring will he phenolypically roan hair and will be genotypically Rr Shoumia w domenang.