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3.3 Inheritance

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Question 4

A breeder carries out several crosses between lizards with genotype GgGgGg. The allele G G\,G for green scales is dominant to the allele g g\,g for brown scales. Altogether, 132 offspring are produced.

How many offspring are expected to have green scales?

[1]
A

999999

B

888888

C

666666

D

444444

Markscheme

3.3 Inheritance Questions

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

71 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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