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3.3 Inheritance

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Question 6
F

A student uses a Punnett square to predict the offspring of Bb×BbBb \times BbBb×Bb. The square contains BBBBBB, BbBbBb, Bb Bb\,Bb and bbbbbb.

Which conclusion is correct?

[1]
A

Two genotypes and three phenotypes are possible.

B

Four genotypes and two phenotypes are possible.

C

Three genotypes and two phenotypes are possible.

D

Two genotypes and four phenotypes are possible.

Markscheme

3.3 Inheritance Questions

  1. GCSE
  2. /Biology
  3. /3.3 Inheritance

43 exam-style questions on Edexcel GCSE Biology 3.3 Inheritance, covering 3.3.1 Gregor Mendel and the basis of genetics, 3.3.2 Alleles and inherited characteristics, 3.3.3 Monohybrid inheritance, 3.3.4 Determination of sex at fertilisation, 3.3.5 Outcomes from monohybrid crosses, 3.3.6 Inheritance of ABO blood groups, 3.3.7 Inheritance of sex-linked disorders, and 3.3.8 Multiple genes and phenotypic features. Each one has a worked solution and a mark scheme showing where the marks go.

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