Inherited Traits
This type of trait is passed from parents to offspring through genes (example: eye color).
Inherited trait
This type of trait is gained during an organism’s life and is not passed on genetically (example: a scar).
Acquired trait
The offspring of two organisms gets features from its parents. What word describes this passing of traits?
Inheritance (or heredity)
What is the word for the "instructions" inside a cell that control traits?
Gene
Which can affect how an organism grows: genes, the environment, or both?
Both
Name one physical trait that is commonly inherited in humans.
Example answers: eye color, hair color, blood type, height.
Is learning to ride a bike inherited or acquired? Explain your reasoning
Acquired — it is learned, not passed in DNA.
If both parent plants have yellow seeds and produce some offspring with green seeds, name one reason this might happen.
Genetic variation from different alleles or a mutation; mixing of parental alleles.
Define "trait" in one simple sentence.
A trait is a characteristic or feature of an organism, like eye color.
Give one example of how the environment can change an organism’s traits (not genetic).
Examples: Nutrition can affect height; sunlight affects plant growth.
True or False: Having dimples is an inherited trait.
True. Dimples are typically inherited.
Describe one acquired trait in animals and how it happens (1–2 sentences).
Example: A scar from an injury — it happens when the animal is hurt and the skin heals, but the scar isn't passed to offspring.
True or False: Offspring always look exactly like one of their parents. Explain in one sentence.
False — offspring resemble parents but are not exact copies because of genetic variation.
What is an allele? Give an example
An allele is a version of a gene (for example, a gene for flower color might have a red allele or a white allele).
A kitten is born with short fur, but grows a thicker coat when raised in a colder climate. Is the thicker coat inherited or environmental? Explain briefly.
Environmental effect — the thicker coat develops because of the colder climate, not a genetic change.
Why might offspring resemble their parents (one sentence).
Offspring inherit genes from their parents that carry instructions for traits.
Why can acquired traits not be used to change the traits of the next generation?
Because acquired traits are not stored in the DNA that is passed to offspring.
Describe how scientists can tell whether a trait is inherited (1–2 sentences).
Scientists observe the trait across generations and use controlled breeding or family studies to see if the trait is consistently passed on.
Explain the difference between genotype and phenotype (1–2 sentences).
Genotype is the genetic makeup (the genes an organism has); phenotype is the physical trait you can see.
Explain in two sentences how both genes and environment can influence a trait.
Genes give the instructions for possible traits an organism can have. The environment can change how those traits develop or how strongly they appear.
Give two examples of inherited traits in plants.
Examples: seed color, flower color, leaf shape
A plant grown in low light becomes tall and spindly. Is this change inherited or acquired? Explain your reasoning.
Acquired — caused by the environment (low light), not a genetic change.
Two pure-bred plants (one tall, one short) produce offspring that are all tall. What does this suggest about the tall trait?
It suggests the tall trait is dominant in that cross.
Use "gene," "allele," and "inherited" in one sentence about eye color.
Eye color is inherited because genes with different alleles determine whether someone has brown or blue eyes.
A plant population has a gene for slightly smaller leaves; plants in a dry area show smaller leaves than the same plants in wet areas. Explain how inheritance and environment contribute (2–3 sentences).
Inheritance provides the gene for leaf size, so some plants are predisposed to smaller leaves. The dry environment causes those genes to produce smaller leaves more strongly and may favor survival of plants with smaller-leaf genes over time, increasing their frequency.