Chromosomes I has ……..A…...genes and Y-chromosome has .....B…... genes.

Options

A. A - 4968, B - 123
B. A - 4986, B - 123
C. A - 8962, B - 231
D. A - 2968, B - 321

Answer

To solve the question regarding the number of genes in chromosomes I and Y, we can follow these steps:

### Step 1: Identify the number of genes in Chromosome I
- Chromosome I is known to be the largest chromosome in humans. Research indicates that it contains approximately 25,000 to 30,000 genes. For the purpose of this question, we can take the average value, which is around 29,000 genes.

### Step 2: Identify the number of genes in the Y chromosome
- The Y chromosome is significantly smaller than Chromosome I and contains fewer genes. According to research, the Y chromosome has about 321 genes, with the SRY gene being one of the most notable ones, which is important for male sex determination.

### Step 3: Fill in the blanks
- Now we can fill in the blanks based on our findings:
- A: 29,000 (or approximately 25,000 to 30,000 genes)
- B: 321 genes

### Final Answer
- Chromosome I has **29,000** genes and Y chromosome has **321** genes.

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