Question

i can:
ctermine the probability of blood types of offspring using genotype or phenotype of parents.
use the information below to answer the following questions.
human blood types are determined by genes that follow the codominance pattern of inheritance. there are
two dominant alleles (i^a and i^b) and one recessive allele (i).

1. write the genotype for each person based on the description:

a. homozygous for the \b\ allele
______
b. heterozygous for the \a\ allele
______
c. type o
______
d. type \a\ and had a type \o\ parent
______
e. type \ab\
______
f. blood can be donated to anybody
______
g. can only get blood from a type \o\ donor
______

1. pretend that dad is homozygous for the type b allele, and mom is type \o.\ what are all the possible blood types of their baby?
2. draw a punnett square showing all the possible blood types for the offspring produced by a type \o\ mother and an a type \ab\ father

Explanation:

Step1: Analyze each description

• a. Homozygous for the "B" allele: \(I^{B}I^{B}\)
• b. Heterozygous for the "A" allele: \(I^{A}i\)
• c. Type O: \(ii\)
• d. Type "A" and had a type "O" parent: \(I^{A}i\)
• e. Type "AB": \(I^{A}I^{B}\)
• f. Blood can be donated to anybody (universal donor): \(ii\)
• g. Can only get blood from a type "O" donor: \(ii\)

Step2: Solve problem 2

Dad is \(I^{B}I^{B}\), mom is \(ii\). Using Punnett square:

	\(I^{B}\)	\(I^{B}\)
\(i\)	\(I^{B}i\)	\(I^{B}i\)

So baby's blood type is \(I^{B}i\) (Type B)

Step3: Solve problem 3

Mom is \(ii\), dad is \(I^{A}I^{B}\). Punnett square:

	\(I^{A}\)	\(I^{B}\)
\(i\)	\(I^{A}i\)	\(I^{B}i\)

Possible blood types: \(I^{A}i\) (Type A) and \(I^{B}i\) (Type B)

Answer:

1.
a. \(I^{B}I^{B}\)
b. \(I^{A}i\)
c. \(ii\)
d. \(I^{A}i\)
e. \(I^{A}I^{B}\)
f. \(ii\)
g. \(ii\)

1. Type B
2. Type A and Type B