There are 3 alleles that lead to the ABO blood types. How many allels does and individual inherit from its parents
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There are 3 alleles that lead to the ABO blood types. How many total alleles does an individual inherit from their parents?
Joanna Q.
Each of us has an ABO blood type, which describes whether two characteristics called A and B are present. Every human being has two blood type alleles (gene forms), one inherited from our mother and one from our father. Each of these alleles can be A, B, or O, and the two alleles we inherit from our parents determine our blood type. Below is a table that shows what our blood type is for each combination of two alleles. We inherit each of a parent's two alleles with probability 0.5. We inherit independently from our mother and father. Alleles inherited | A & A | A & B | A & O | B & B | B & O | O & O Blood type | A | AB | A | B | B | O Jess has alleles A and O, Pat has alleles B and B. They have two children. What is the probability that each child has a different blood type? Use the table and blood type information from the previous question. Suppose that Sam has alleles A and O, Chris has alleles O and B, and they have three children. What is the probability that all of their children have the same blood type?
In this scenario, the mother has blood type A and is heterozygous (I^Ai). The father has blood type AB (I^AI^B). Remember – the I^A and I^B alleles are codominant with each other...but both are dominant to the i allele. First, please complete the Punnett square below. Add one allele into each parental allele box, and a complete genotype (such as I^AI^B, I^Bi or ii) into each offspring box. Remember that dominant alleles should always be written before recessive alleles in a genotype (I^Bi, never iI^B). Please watch my videos! BLOOD TYPE (A and B alleles are CO-DOMINANT with each other) I^A = allele for type A I^B = allele for type B i = allele for type O Mother allele #1: Mother allele #2: Father allele #1: Father allele #2: To choose your answer for each of the three questions below, please highlight it. How many different blood types are possible in the offspring? 1 2 3 4 5 What percentage of the offspring have at least one ‐i‐ allele? 0% 25% 50% 75% 100% What percentage of the offspring have two alleles that are co-dominant? 0% 25% 50% 75% 100%
Adi S.
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