Genetic crosses (AQA GCSE Biology Combined Science): Quizzes
📚Quizzes
Practise the questions
10 questions from this quiz
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Practise the questions
10 questions from this quiz
What is the main purpose of genetic crosses?
What is the main purpose of genetic crosses?
To predict traits offspring inherit
What are the two main methods used to predict genetic outcomes?
What are the two main methods used to predict genetic outcomes?
Genetic diagrams and Punnett squares
How are dominant alleles shown in genetic notation?
How are dominant alleles shown in genetic notation?
Capital letters
What does heterozygous mean?
What does heterozygous mean?
Having two different alleles for a trait
When two Rr plants cross, what is the ratio of purple to white flowers?
When two Rr plants cross, what is the ratio of purple to white flowers?
3:1
What is the probability of white flowers in an Rr × Rr cross?
What is the probability of white flowers in an Rr × Rr cross?
25%
What is needed to show a recessive trait?
What is needed to show a recessive trait?
Two recessive alleles
In a Gg × gg cross, what percentage of offspring have yellow pods (gg)?
In a Gg × gg cross, what percentage of offspring have yellow pods (gg)?
50%
When crossing Bb × Bb rabbits, what % have brown fur (bb)?
When crossing Bb × Bb rabbits, what % have brown fur (bb)?
25%
Why might actual results differ from predicted ratios?
Why might actual results differ from predicted ratios?
Due to chance with small offspring numbers