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Year 5 Genetics Quiz

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Year 5 Genetics Quiz

While waiting for a bike repair, explore how living things inherit features. Read each question carefully. Genetics describes patterns of inheritance, but real traits can be more complicated than the simple examples in this quiz.

Genes and inheritance

Use what you know about cells, DNA and inherited features.

1.DNA is a molecule found in living things. What is the full name of DNA?

Deoxyribonucleic acid
Dynamic nuclear acid
Double nutrient arrangement
Diverse natural atoms

2.Inside most human cells, chromosomes are found in the nucleus. Is this true or false?

3.A gene is a section of DNA that helps determine a feature. Different versions of a gene are called what?

Alleles
Organs
Cells
Chromosomes

4.In a simple model, allele B is dominant and allele b is recessive. Which feature would a living thing with genotype Bb show?

5.Is the statement “a dominant trait will always show up in every offspring” true or false?

Cell detectives

Different cells have structures and shapes that help them do particular jobs.

6.Match each specialised cell to its main job.

Red blood cell
Nerve cell
Muscle cell

Carries messages around the body
Carries oxygen around the body
Contracts to help the body move

7.Why are specialised cells useful in the human body? Give one cell type and describe its job.

8.A mutation is a change in DNA. Is every mutation harmful? Explain your answer in one sentence.

Inheritance puzzle

For these questions, use a simplified model with two alleles: B is dominant and b is recessive. A Punnett square helps show possible allele combinations; it does not guarantee which combination a particular offspring will inherit.

9.A student writes the alleles from two Bb parents along the edges of a Punnett square. Complete all four possible combinations.

10.For two Bb parents, what fraction of the four possible allele combinations is bb?

0 out of 4
1 out of 4
2 out of 4
3 out of 4

11.Two parents each have genotype Bb. In the simple model, B gives the dominant feature and b gives the recessive feature. What is the chance, expressed as a percentage, of an offspring having genotype bb?

12.A child shares some features with their parents but is not exactly the same as either parent. Give one reason why family members can have similarities and one reason why they can still differ.