Learning objective
Use dominant, recessive, codominant, homozygous and heterozygous terminology.
Read the explanation, check the common trap, then practise with flashcards and questions.
At a glance
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Questions
Topic
Genetics and ecosystems official content
Subtopic
Inheritance
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Quick explanation
Use dominant, recessive, codominant, homozygous and heterozygous terminology
- This point belongs to Genetics and ecosystems official content, especially Inheritance.
- You need to be able to use dominant, recessive, codominant, homozygous and heterozygous terminology.
- The key ideas to know are heterozygous and homozygous.
- Use the linked flashcards and practice questions to check recall, then practise applying the idea in an exam-style answer.
Key concepts
Why it matters
This objective helps connect Inheritance to exam-style questions, flashcards, and revision notes for Genetics and ecosystems official content.
Quick student answer
Which of the following statements correctly describes a homozygous genotype?
Direct answer
A genotype with two identical alleles for a trait.
Key terms
- Dominant: An allele that expresses its phenotype even in the presence of a different allele.
- Heterozygous: A genotype with two different alleles for a particular gene.
Common trap
Confusing Dominant and Recessive Alleles: Dominance refers to the expression of the allele, not its frequency in the population.
Related questions
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Flashcard prompts
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Revision notestopic notes
Open the full topic revision notes when you are ready to review this objective in context.
Open revision notesRelated learning objectives
- Define genotype and phenotype.
Inheritance
- Use fully labelled genetic diagrams for monohybrid and dihybrid crosses.
Inheritance
- Interpret crosses involving sex-linkage, autosomal linkage, multiple alleles and epistasis.
Inheritance
- Use chi-squared testing to compare observed and expected phenotypic ratios.
Inheritance
- Define a population as organisms of the same species in a space and time that can potentially interbreed.
Populations