i, j, l and v-shaped chromosomes are, respectively,

Options

A. metacentric, acrocentric, geocentric, sub-metacentric
B. acrocentric , sub-metacentric, metacentric, telocentric
C. telocentric, acrocentric, sub-metacentric, metacentric
D. Sub-metacentric, telocentric, acrocentric, metacentric

Answer

To solve the question regarding the shapes of chromosomes (I, J, L, and V-shaped), we need to understand how the position of the centromere affects the shape of the chromosome. Here’s a step-by-step breakdown:

### Step 1: Understanding Chromosome Structure
- Chromosomes are structures made of DNA and proteins that become visible during cell division. They can take on different shapes based on the position of the centromere.

**Hint:** Remember that the centromere is the constricted region of the chromosome that plays a crucial role during cell division.

### Step 2: Identifying I-shaped Chromosomes
- An I-shaped chromosome has a terminal centromere, meaning the centromere is located at one end of the chromosome. This type of chromosome is known as **telocentric**.

**Hint:** Think of the letter "I" as a straight line, indicating that the centromere is at one end.

### Step 3: Identifying J-shaped Chromosomes
- A J-shaped chromosome has a centromere that is close to one end, resulting in one short arm and one long arm. This type is referred to as **acrocentric**.

**Hint:** Visualize the letter "J" where the short part represents the short arm and the long part represents the long arm.

### Step 4: Identifying L-shaped Chromosomes
- An L-shaped chromosome has a centromere that is slightly off-center, creating one short arm and one longer arm, but not extremely long. This type is called **submetacentric**.

**Hint:** The letter "L" helps you remember that one arm is shorter than the other, but both are relatively close in length.

### Step 5: Identifying V-shaped Chromosomes
- A V-shaped chromosome has a centromere located in the center, resulting in two equal arms. This type is known as **metacentric**.

**Hint:** The letter "V" indicates that both arms are of equal length, showing a balanced structure.

### Final Answer
- Based on the above analysis, the correct classifications for the shapes of chromosomes are:
- I-shaped: **Telocentric**
- J-shaped: **Acrocentric**
- L-shaped: **Submetacentric**
- V-shaped: **Metacentric**

Thus, the answer is: **I - Telocentric, J - Acrocentric, L - Submetacentric, V - Metacentric**.