Alleles (Edexcel GCSE Biology): Quizzes
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Practise the questions
12 questions from this quiz
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Practise the questions
12 questions from this quiz
What are alleles?
What are alleles?
Different versions of the same gene
How many alleles does each individual have for each gene?
How many alleles does each individual have for each gene?
Two
What term describes an individual with two identical alleles for a gene?
What term describes an individual with two identical alleles for a gene?
Homozygous
What term describes an individual with two different alleles for a gene?
What term describes an individual with two different alleles for a gene?
Heterozygous
What is the genotype?
What is the genotype?
Combination of alleles an individual has
What is the phenotype?
What is the phenotype?
Physical expression of the trait
How are dominant alleles represented?
How are dominant alleles represented?
Capital letter
How are recessive alleles represented?
How are recessive alleles represented?
Lowercase letter
When is a dominant allele expressed?
When is a dominant allele expressed?
Even if only one copy is present
When is a recessive allele expressed?
When is a recessive allele expressed?
Only if two copies are present
Which genotypes show the dominant characteristic?
Which genotypes show the dominant characteristic?
CC or Cc
Which genotype is needed for a recessive characteristic?
Which genotype is needed for a recessive characteristic?
cc