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3.3 Inheritance

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Question 8

The allele $L\,$ for long wings is dominant to the allele $l\,$ for short wings in an insect.

Table

Cross	Long-winged offspring	Short-winged offspring
P	102	98
Q	151	49

Which pair of parental genotypes best explains cross P?

[1]

$Ll \times ll$

$LL \times ll$

$Ll \times Ll$

$LL \times Ll$

Markscheme

3.3 Inheritance Questions

GCSE
Biology
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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