(a(i))[2]
Describe what the term gene means.
(a(ii))[1]
State the name of a human cell structure that contains genes.
(b)[1]
Calculate how many people with albinism are expected in a population of 270 000 people.
(c(i))[1]
State the sex chromosomes of person 1 in Fig. 5.1.
(c(ii))[1]
State how many people in Fig. 5.1 are affected by albinism.
(c(iii))[1]
Circle the option that gives the correct description of the genotype of person 3 in Fig. 5.1.
(d)[4]
Complete the genetic diagram to show the possible genotypes and phenotypes of this child, then state the ratio of unaffected people to people with albinism.