Human beings have________ alleles for ABO blood grouping with _________ phenotypes and________ genotypes.

Options

A. 4,3,6
B. 4,6,3
C. 3,4,6
D. 6,3,4

Answer

To solve the question regarding the number of alleles, phenotypes, and genotypes for ABO blood grouping in human beings, we can follow these steps:

### Step 1: Identify the number of alleles
ABO blood grouping is controlled by multiple alleles. The alleles involved are:
- IA
- IB
- i (or I)

Thus, there are **3 alleles** in total.

### Step 2: Determine the number of phenotypes
The phenotypes for the ABO blood group are:
- Blood group A
- Blood group B
- Blood group AB
- Blood group O

This gives us a total of **4 phenotypes**.

### Step 3: Calculate the number of genotypes
The possible genotypes for ABO blood grouping are:
1. IA IA (Blood group A)
2. IA i (Blood group A)
3. IB IB (Blood group B)
4. IB i (Blood group B)
5. IA IB (Blood group AB)
6. ii (Blood group O)

This results in a total of **6 genotypes**.

### Final Answer
Therefore, human beings have **3 alleles** for ABO blood grouping, with **4 phenotypes** and **6 genotypes**.

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