Skip to content

Course home

Sign up

3.3 Inheritance

EasyMediumHard
12
Question 2
F

The Figure shows a Punnett square for the inheritance of sex in humans.

Figure

image

a.

Give the sex chromosome in gamete P.

[1]
b.

Give the sex chromosomes in offspring Q.

[1]
c.

State the probability that a child of these parents will be male.

[1]
d.

A couple already have three sons. They are expecting a fourth child.

Explain the probability that the fourth child will be a girl.

[2]
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.

Question bank