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5.1 Inheritance

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Question 30

A gene controlling a specific characteristic has two alleles, B\mathbf{B}B and b\mathbf{b}b. B\mathbf{B}B is the dominant allele.

One individual has the genotype Bb\mathbf{Bb}Bb and another individual has the genotype bb\mathbf{bb}bb for this gene.

Which statement correctly describes these two individuals?

A

They have the same phenotype but different genotypes for this characteristic.

B

They have different phenotypes and different genotypes for this characteristic.

C

They have the same phenotype and the same genotype for this characteristic.

D

They have different phenotypes but the same genotype for this characteristic.

Markscheme

5.1 Inheritance Questions

  1. GCSE
  2. /Biology
  3. /5.1 Inheritance

97 exam-style questions on OCR GCSE Biology 5.1 Inheritance, covering 5.1.1 The genome, 5.1.2 Environment and phenotype, 5.1.3 Variants and mutations, 5.1.4 How genetic variants influence phenotype, 5.1.5 Asexual and sexual reproduction, 5.1.6 Haploid and diploid, 5.1.7 Meiotic cell division, 5.1.8 Single gene inheritance, 5.1.9 Predicting single gene crosses, 5.1.10 Sex determination, 5.1.11 Multiple gene inheritance, and 5.1.12 Development of our understanding of genetics. Each one has a worked solution and a mark scheme showing where the marks go.

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