The terms 'clone' cannot be applied to offspring formed by sexual reproduction because

Options

A. Offspring do not possess exact copies of parental DNA
B. DNA of only one parent is copied and passed on to the offspring
C. Offspring are formed at different times
D. DNA of parent and offspring are completely different

Answer

To understand why the term 'clone' cannot be applied to offspring formed by sexual reproduction, we can break down the explanation into clear steps:

### Step-by-Step Solution:

1. **Definition of Clone**: A clone is defined as an individual that has identical DNA to another individual, typically the parent. This means that the genetic material is an exact copy.

2. **Mechanism of Sexual Reproduction**: In sexual reproduction, offspring are produced through the combination of genetic material from two parents (male and female). Each parent contributes half of the genetic material through gametes (sperm and egg).

3. **Gamete Formation**: The gametes are formed through a process called meiosis, which involves the recombination of genetic material. This results in gametes that are genetically unique due to the mixing of genes from both parents.

4. **Fertilization**: When fertilization occurs, the sperm and egg combine to form a zygote. This zygote has a unique combination of genes, which is different from both parents.

5. **Genetic Variation**: Because of the genetic recombination that occurs during gamete formation and the contribution from both parents, the offspring exhibit genetic variation. This means they do not possess exact copies of the parental DNA.

6. **Conclusion**: Therefore, since the offspring produced by sexual reproduction have a unique genetic makeup that is not an exact copy of either parent, they cannot be classified as clones.

### Final Answer:
The terms 'clone' cannot be applied to offspring formed by sexual reproduction because offspring do not possess exact copies of parental DNA.

---