Parent genotypes -> gametes -> offspring genotypes -> phenotype -> probability

Question 5 of 5

AQA Combined Science Higher Biology Paper 2 6 marks

This question is about genetic disorders.

Figure 6
Figure 6 from the source question paper.

Figure 6 shows the inheritance of a genetic disorder in a family. Person 7 and person 8 plan to have another child. Determine the probability that the child will be a male who has the disorder. You should: • draw a Punnett square diagram • identify the genotype of person 7 and the genotype of person 8 • identify the phenotype of each offspring genotype • use the symbols: H = dominant allele h = recessive allele Probability of having a male child with the disorder =

Try from memory first

Compare with the chain after you check.