Genetic Diagrams

Question 1

Predicting the genotype of an offspring

Answer 1

Gametes only have one copy of each chromosome and so only have one copy of a gene and so only one allele. If a person is heterozygous for an eye colour, half of their gametes have one allele while the other half has another

Question 2

Punnett squares

Answer 2

A Punnett square allows us to predict the characteristics of an offspring if you know your parents genotype