Why do offspring resemble parents without being exact copies?

A useful starting point is inherited information. Reproduction passes DNA containing genes to offspring, and genes contribute to characteristics shared within a species. In the source’s cat example, kittens inherit genes from both parents, so they can share characteristics while still not all looking alike. [S1]

You could explain it this way: “The kittens resemble their parents because they inherit genetic information, but each kitten is an individual, not a photocopy.” That keeps the key ideas together without suggesting that every kitten gets an identical set of characteristics or looks the same.

For a concept map, put “offspring resemble parents” in the middle, then connect it to “inherited information” and “differences among offspring.” Add “environmental influences” as a separate branch to explore, rather than treating it as another name for inheritance. The cited material does not explain which environmental conditions affect a particular trait, so avoid making a specific claim about that without an appropriate source.

Here is a compact version you can copy:

Offspring resemble parents ├─ Inheritance: DNA and genes are passed to offspring; genes contribute to shared characteristics. [S1] ├─ Variation: offspring are not all alike, even when they share parents. [S1] └─ Environment: conditions around an organism to consider when asking what may influence an observable trait.

The first branch describes why resemblance is possible. The second reminds readers that resemblance does not mean exact sameness. The third is deliberately phrased as a question area: the cited source excerpt does not establish which conditions matter, how they affect traits, or how large any effect might be. If this is for a class assignment, you can leave that branch as a prompt for further evidence rather than filling it with guesses.

Use one observation and three short prompts. For example, imagine two fictional kittens, Pip and Dot. Ask: “What do they have in common?” Then: “What is different?” Finally: “Could conditions around them be worth asking about?”

A possible child-friendly response is: “Pip and Dot are both kittens, and they may share features with their parents because they inherit genetic information. But they are not exact copies, so they can look different from each other. We can also ask whether their surroundings matter, but we would need evidence before saying how.” The inheritance and variation explanation is supported by the source; the last sentence correctly leaves environmental effects open. [S1]

Keep the example focused on visible observations, such as a fictional coat pattern, without claiming that a particular pattern came from a named parent or environmental condition. This is a teaching illustration, not a real animal’s history or a claim about a specific trait’s biological cause.

Check that each branch does a different job: inheritance explains shared characteristics; variation captures differences among offspring; and environment is a separate topic to investigate, not an explanation you have already proved. Keep the wording modest: genes contribute to characteristics, but the source does not say that genes determine every feature or that offspring are exact copies. [S1]

A useful closing question is: “Which part of our map explains resemblance, which part explains differences, and what would we need to learn before making a claim about the environment?” That lets the learner distinguish an explanation supported here from a question that needs further evidence.